diff --git a/.markdownlint-cli2.yaml b/.markdownlint-cli2.yaml
index a84ac9d3..830f1564 100644
--- a/.markdownlint-cli2.yaml
+++ b/.markdownlint-cli2.yaml
@@ -1,4 +1,4 @@
-globs: ["**.md"]
+# globs: ["**.md"]
 ignores: ["node_modules/**"]
 config:
   # BNF syntax examples can go over length, and there's no way to exempt them
diff --git a/accepted/module-system.md b/accepted/module-system.md
index 4531a61c..6d9eb08c 100644
--- a/accepted/module-system.md
+++ b/accepted/module-system.md
@@ -1552,7 +1552,7 @@ The built-in functions will be organized as follows:
 | `unquote`                |           | sass:string   |   | `type-of`                |                    | sass:meta     |
 | `quote`                  |           | sass:string   |   | `call`                   |                    | sass:meta     |
 | `str-length`             | `length`  | sass:string   |   | `content-exists`         |                    | sass:meta     |
-| `str-insert`             | `insert`  | sass:string   |   | `keywords`               |                    | sass:meta
+| `str-insert`             | `insert`  | sass:string   |   | `keywords`               |                    | sass:meta     |
 | `str-index`              | `index`   | sass:string   |   |                          | `module-variables` | sass:meta     |
 | `str-slice`              | `slice`   | sass:string   |   |                          | `module-functions` | sass:meta     |
 | `to-upper-case`          |           | sass:string   |   |                          |                    |               |
diff --git a/package-lock.json b/package-lock.json
index e7edb87d..7abe8384 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,6 @@
       "dependencies": {
         "@types/diff": "^5.0.1",
         "@types/glob": "^7.1.4",
-        "@types/js-yaml": "^4.0.3",
         "@types/marked": "^4.0.8",
         "@types/node": "^14.11.2",
         "@types/prettier": "^2.4.1",
@@ -18,17 +17,17 @@
         "gts": "^3.1.0",
         "immutable": "^4.0.0",
         "indent-string": "^4.0.0",
-        "js-yaml": "^4.1.0",
         "markdown-link-check": "3.11.1",
         "markdown-toc": "^1.2.0",
-        "markdownlint-cli2": "^0.8.1",
+        "markdownlint-cli2": "^0.13.0",
         "marked": "^4.3.0",
         "prettier": "^2.4.1",
         "source-map-js": "^0.6.2",
         "ts-dedent": "^2.2.0",
         "ts-node": "^10.2.1",
         "typedoc": "^0.24.7",
-        "typescript": "^5.0.4"
+        "typescript": "^5.0.4",
+        "yaml": "^2.2.1"
       },
       "engines": {
         "node": ">=14.0.0"
@@ -306,6 +305,17 @@
         "node": ">=14"
       }
     },
+    "node_modules/@sindresorhus/merge-streams": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/@sindresorhus/merge-streams/-/merge-streams-2.3.0.tgz",
+      "integrity": "sha512-LtoMMhxAlorcGhmFYI+LhPgbPZCkgP6ra1YL604EeF6U98pLlQ3iWIGMdWSC+vWmPBWBNgmDBAhnAobLROJmwg==",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/@tsconfig/node10": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@tsconfig/node10/-/node10-1.0.8.tgz",
@@ -340,11 +350,6 @@
         "@types/node": "*"
       }
     },
-    "node_modules/@types/js-yaml": {
-      "version": "4.0.9",
-      "resolved": "https://registry.npmjs.org/@types/js-yaml/-/js-yaml-4.0.9.tgz",
-      "integrity": "sha512-k4MGaQl5TGo/iipqb2UDG2UwjXziSWkh0uysQelTlJpX1qGlpUZYm8PnO4DxG1qBomtJUdYJ6qR6xdIah10JLg=="
-    },
     "node_modules/@types/json-schema": {
       "version": "7.0.9",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.9.tgz",
@@ -1574,9 +1579,9 @@
       "integrity": "sha512-xJuoT5+L99XlZ8twedaRf6Ax2TgQVxvgZOYoPKqZufmJib0tL2tegPBOZb1pVNgIhlqDlA0eO0c3wBvQcmzx4w=="
     },
     "node_modules/fast-glob": {
-      "version": "3.3.1",
-      "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.3.1.tgz",
-      "integrity": "sha512-kNFPyjhh5cKjrUltxs+wFx+ZkbRaxxmZ+X0ZU31SOsxCEtP9VPgtq2teZw1DebupL5GmDaNQ6yKMMVcM41iqDg==",
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.3.2.tgz",
+      "integrity": "sha512-oX2ruAFQwf/Orj8m737Y5adxDQO0LAB7/S5MnxCdTNDd4p6BsyIVsv9JQsATbTSq8KHRpLwIHbVlUNatxd+1Ow==",
       "dependencies": {
         "@nodelib/fs.stat": "^2.0.2",
         "@nodelib/fs.walk": "^1.2.3",
@@ -2295,9 +2300,9 @@
       }
     },
     "node_modules/jsonc-parser": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-3.2.0.tgz",
-      "integrity": "sha512-gfFQZrcTc8CnKXp6Y4/CBT3fTc0OVuDofpre4aEeEpSBPV5X5v4+Vmx+8snU7RLPrNHPKSgLxGo9YuQzz20o+w=="
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-3.2.1.tgz",
+      "integrity": "sha512-AilxAyFOAcK5wA1+LeaySVBrHsGQvUFCDWXKpZjzaL0PqW+xfBOttn8GNtWKFWqneyMZj41MWF9Kl6iPWLwgOA=="
     },
     "node_modules/kind-of": {
       "version": "3.2.2",
@@ -2355,11 +2360,11 @@
       "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
     },
     "node_modules/linkify-it": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/linkify-it/-/linkify-it-4.0.1.tgz",
-      "integrity": "sha512-C7bfi1UZmoj8+PQx22XyeXCuBlokoyWQL5pWSP+EI6nzRylyThouddufc2c1NDIcP9k5agmN9fLpA7VNJfIiqw==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/linkify-it/-/linkify-it-5.0.0.tgz",
+      "integrity": "sha512-5aHCbzQRADcdP+ATqnDuhhJ/MRIqDkZX5pyjFHRRysS8vZ5AbqGEoFIb6pYHPZ+L/OC2Lc+xT8uHVVR5CAK/wQ==",
       "dependencies": {
-        "uc.micro": "^1.0.1"
+        "uc.micro": "^2.0.0"
       }
     },
     "node_modules/list-item": {
@@ -2462,18 +2467,19 @@
       }
     },
     "node_modules/markdown-it": {
-      "version": "13.0.1",
-      "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-13.0.1.tgz",
-      "integrity": "sha512-lTlxriVoy2criHP0JKRhO2VDG9c2ypWCsT237eDiLqi09rmbKoUetyGHq2uOIRoRS//kfoJckS0eUzzkDR+k2Q==",
+      "version": "14.1.0",
+      "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-14.1.0.tgz",
+      "integrity": "sha512-a54IwgWPaeBCAAsv13YgmALOF1elABB08FxO9i+r4VFk5Vl4pKokRPeX8u5TCgSsPi6ec1otfLjdOpVcgbpshg==",
       "dependencies": {
         "argparse": "^2.0.1",
-        "entities": "~3.0.1",
-        "linkify-it": "^4.0.1",
-        "mdurl": "^1.0.1",
-        "uc.micro": "^1.0.5"
+        "entities": "^4.4.0",
+        "linkify-it": "^5.0.0",
+        "mdurl": "^2.0.0",
+        "punycode.js": "^2.3.1",
+        "uc.micro": "^2.1.0"
       },
       "bin": {
-        "markdown-it": "bin/markdown-it.js"
+        "markdown-it": "bin/markdown-it.mjs"
       }
     },
     "node_modules/markdown-it/node_modules/argparse": {
@@ -2481,17 +2487,6 @@
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
       "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q=="
     },
-    "node_modules/markdown-it/node_modules/entities": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/entities/-/entities-3.0.1.tgz",
-      "integrity": "sha512-WiyBqoomrwMdFG1e0kqvASYfnlb0lp8M5o5Fw2OFq1hNZxxcNk8Ik0Xm7LxzBhuidnZB/UtBqVCgUz3kBOP51Q==",
-      "engines": {
-        "node": ">=0.12"
-      },
-      "funding": {
-        "url": "https://github.com/fb55/entities?sponsor=1"
-      }
-    },
     "node_modules/markdown-link": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/markdown-link/-/markdown-link-0.1.1.tgz",
@@ -2564,36 +2559,40 @@
       }
     },
     "node_modules/markdownlint": {
-      "version": "0.29.0",
-      "resolved": "https://registry.npmjs.org/markdownlint/-/markdownlint-0.29.0.tgz",
-      "integrity": "sha512-ASAzqpODstu/Qsk0xW5BPgWnK/qjpBQ4e7IpsSvvFXcfYIjanLTdwFRJK1SIEEh0fGSMKXcJf/qhaZYHyME0wA==",
+      "version": "0.34.0",
+      "resolved": "https://registry.npmjs.org/markdownlint/-/markdownlint-0.34.0.tgz",
+      "integrity": "sha512-qwGyuyKwjkEMOJ10XN6OTKNOVYvOIi35RNvDLNxTof5s8UmyGHlCdpngRHoRGNvQVGuxO3BJ7uNSgdeX166WXw==",
       "dependencies": {
-        "markdown-it": "13.0.1",
-        "markdownlint-micromark": "0.1.5"
+        "markdown-it": "14.1.0",
+        "markdownlint-micromark": "0.1.9"
       },
       "engines": {
-        "node": ">=16"
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/DavidAnson"
       }
     },
     "node_modules/markdownlint-cli2": {
-      "version": "0.8.1",
-      "resolved": "https://registry.npmjs.org/markdownlint-cli2/-/markdownlint-cli2-0.8.1.tgz",
-      "integrity": "sha512-y0Siwt+RApKxSSb0CT9p7z1DcAO+ncjrB9IpC/jflJRIet4namCFmxLTbfBBQdPF6EntPk5yyXKe7vcoPGlnXw==",
+      "version": "0.13.0",
+      "resolved": "https://registry.npmjs.org/markdownlint-cli2/-/markdownlint-cli2-0.13.0.tgz",
+      "integrity": "sha512-Pg4nF7HlopU97ZXtrcVISWp3bdsuc5M0zXyLp2/sJv2zEMlInrau0ZKK482fQURzVezJzWBpNmu4u6vGAhij+g==",
       "dependencies": {
-        "globby": "13.1.4",
-        "markdownlint": "0.29.0",
+        "globby": "14.0.1",
+        "js-yaml": "4.1.0",
+        "jsonc-parser": "3.2.1",
+        "markdownlint": "0.34.0",
         "markdownlint-cli2-formatter-default": "0.0.4",
-        "micromatch": "4.0.5",
-        "strip-json-comments": "5.0.0",
-        "yaml": "2.3.1"
+        "micromatch": "4.0.5"
       },
       "bin": {
-        "markdownlint-cli2": "markdownlint-cli2.js",
-        "markdownlint-cli2-config": "markdownlint-cli2-config.js",
-        "markdownlint-cli2-fix": "markdownlint-cli2-fix.js"
+        "markdownlint-cli2": "markdownlint-cli2.js"
       },
       "engines": {
-        "node": ">=16"
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/DavidAnson"
       }
     },
     "node_modules/markdownlint-cli2-formatter-default": {
@@ -2605,27 +2604,28 @@
       }
     },
     "node_modules/markdownlint-cli2/node_modules/globby": {
-      "version": "13.1.4",
-      "resolved": "https://registry.npmjs.org/globby/-/globby-13.1.4.tgz",
-      "integrity": "sha512-iui/IiiW+QrJ1X1hKH5qwlMQyv34wJAYwH1vrf8b9kBA4sNiif3gKsMHa+BrdnOpEudWjpotfa7LrTzB1ERS/g==",
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/globby/-/globby-14.0.1.tgz",
+      "integrity": "sha512-jOMLD2Z7MAhyG8aJpNOpmziMOP4rPLcc95oQPKXBazW82z+CEgPFBQvEpRUa1KeIMUJo4Wsm+q6uzO/Q/4BksQ==",
       "dependencies": {
-        "dir-glob": "^3.0.1",
-        "fast-glob": "^3.2.11",
-        "ignore": "^5.2.0",
-        "merge2": "^1.4.1",
-        "slash": "^4.0.0"
+        "@sindresorhus/merge-streams": "^2.1.0",
+        "fast-glob": "^3.3.2",
+        "ignore": "^5.2.4",
+        "path-type": "^5.0.0",
+        "slash": "^5.1.0",
+        "unicorn-magic": "^0.1.0"
       },
       "engines": {
-        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+        "node": ">=18"
       },
       "funding": {
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/markdownlint-cli2/node_modules/slash": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/slash/-/slash-4.0.0.tgz",
-      "integrity": "sha512-3dOsAHXXUkQTpOYcoAxLIorMTp4gIQr5IW3iVb7A7lFIp0VHhnynm9izx6TssdrIcVIESAlVjtnO2K8bg+Coew==",
+    "node_modules/markdownlint-cli2/node_modules/path-type": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/path-type/-/path-type-5.0.0.tgz",
+      "integrity": "sha512-5HviZNaZcfqP95rwpv+1HDgUamezbqdSYTyzjTvwtJSnIH+3vnbmWsItli8OFEndS984VT55M3jduxZbX351gg==",
       "engines": {
         "node": ">=12"
       },
@@ -2633,10 +2633,10 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/markdownlint-cli2/node_modules/strip-json-comments": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-5.0.0.tgz",
-      "integrity": "sha512-V1LGY4UUo0jgwC+ELQ2BNWfPa17TIuwBLg+j1AA/9RPzKINl1lhxVEu2r+ZTTO8aetIsUzE5Qj6LMSBkoGYKKw==",
+    "node_modules/markdownlint-cli2/node_modules/slash": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/slash/-/slash-5.1.0.tgz",
+      "integrity": "sha512-ZA6oR3T/pEyuqwMgAKT0/hAv8oAXckzbkmR0UkUosQ+Mc4RxGoJkRmwHgHufaenlyAgE1Mxgpdcrf75y6XcnDg==",
       "engines": {
         "node": ">=14.16"
       },
@@ -2645,11 +2645,14 @@
       }
     },
     "node_modules/markdownlint-micromark": {
-      "version": "0.1.5",
-      "resolved": "https://registry.npmjs.org/markdownlint-micromark/-/markdownlint-micromark-0.1.5.tgz",
-      "integrity": "sha512-HvofNU4QCvfUCWnocQP1IAWaqop5wpWrB0mKB6SSh0fcpV0PdmQNS6tdUuFew1utpYlUvYYzz84oDkrD76GB9A==",
+      "version": "0.1.9",
+      "resolved": "https://registry.npmjs.org/markdownlint-micromark/-/markdownlint-micromark-0.1.9.tgz",
+      "integrity": "sha512-5hVs/DzAFa8XqYosbEAEg6ok6MF2smDj89ztn9pKkCtdKHVdPQuGMH7frFfYL9mLkvfFe4pTyAMffLbjf3/EyA==",
       "engines": {
-        "node": ">=16"
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/DavidAnson"
       }
     },
     "node_modules/marked": {
@@ -2669,9 +2672,9 @@
       "integrity": "sha512-rUxjysqif/BZQH2yhd5Aaq7vXMSx9NdEsQcyA07uEzIvxgI7zIr33gGsh+RU0/XjmQpCW7RsVof1vlkvQVCK5A=="
     },
     "node_modules/mdurl": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/mdurl/-/mdurl-1.0.1.tgz",
-      "integrity": "sha512-/sKlQJCBYVY9Ers9hqzKou4H6V5UWc/M59TH2dvkt+84itfnq7uFOMLpOiOS4ujvHP4etln18fmIxA5R5fll0g=="
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/mdurl/-/mdurl-2.0.0.tgz",
+      "integrity": "sha512-Lf+9+2r+Tdp5wXDXC4PcIBjTDtq4UKjCPMQhKIuzpJNW0b96kVqSwW0bT7FhRSfmAiFYgP+SCRvdrDozfh0U5w=="
     },
     "node_modules/meow": {
       "version": "9.0.0",
@@ -3186,6 +3189,14 @@
         "node": ">=6"
       }
     },
+    "node_modules/punycode.js": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/punycode.js/-/punycode.js-2.3.1.tgz",
+      "integrity": "sha512-uxFIHU0YlHYhDQtV4R9J6a52SLx28BCjT+4ieh7IGbgwVJWO+km431c4yRlREUAsAmt/uMjQUyQHNEPf0M39CA==",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/queue-microtask": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/queue-microtask/-/queue-microtask-1.2.3.tgz",
@@ -4043,9 +4054,20 @@
       }
     },
     "node_modules/uc.micro": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-1.0.6.tgz",
-      "integrity": "sha512-8Y75pvTYkLJW2hWQHXxoqRgV7qb9B+9vFEtidML+7koHUFapnVJAZ6cKs+Qjz5Aw3aZWHMC6u0wJE3At+nSGwA=="
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-2.1.0.tgz",
+      "integrity": "sha512-ARDJmphmdvUk6Glw7y9DQ2bFkKBHwQHLi2lsaH6PPmz/Ka9sFOBsBluozhDltWmnv9u/cF6Rt87znRTPV+yp/A=="
+    },
+    "node_modules/unicorn-magic": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/unicorn-magic/-/unicorn-magic-0.1.0.tgz",
+      "integrity": "sha512-lRfVq8fE8gz6QMBuDM6a+LO3IAzTi05H6gCVaUpir2E1Rwpo4ZUog45KpNXKC/Mn3Yb9UDuHumeFTo9iV/D9FQ==",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
     },
     "node_modules/uri-js": {
       "version": "4.4.1",
@@ -4457,6 +4479,11 @@
       "integrity": "sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==",
       "optional": true
     },
+    "@sindresorhus/merge-streams": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/@sindresorhus/merge-streams/-/merge-streams-2.3.0.tgz",
+      "integrity": "sha512-LtoMMhxAlorcGhmFYI+LhPgbPZCkgP6ra1YL604EeF6U98pLlQ3iWIGMdWSC+vWmPBWBNgmDBAhnAobLROJmwg=="
+    },
     "@tsconfig/node10": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@tsconfig/node10/-/node10-1.0.8.tgz",
@@ -4491,11 +4518,6 @@
         "@types/node": "*"
       }
     },
-    "@types/js-yaml": {
-      "version": "4.0.9",
-      "resolved": "https://registry.npmjs.org/@types/js-yaml/-/js-yaml-4.0.9.tgz",
-      "integrity": "sha512-k4MGaQl5TGo/iipqb2UDG2UwjXziSWkh0uysQelTlJpX1qGlpUZYm8PnO4DxG1qBomtJUdYJ6qR6xdIah10JLg=="
-    },
     "@types/json-schema": {
       "version": "7.0.9",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.9.tgz",
@@ -5346,9 +5368,9 @@
       "integrity": "sha512-xJuoT5+L99XlZ8twedaRf6Ax2TgQVxvgZOYoPKqZufmJib0tL2tegPBOZb1pVNgIhlqDlA0eO0c3wBvQcmzx4w=="
     },
     "fast-glob": {
-      "version": "3.3.1",
-      "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.3.1.tgz",
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@@ -5930,11 +5952,11 @@
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+      "resolved": "https://registry.npmjs.org/linkify-it/-/linkify-it-5.0.0.tgz",
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       "requires": {
-        "uc.micro": "^1.0.1"
+        "uc.micro": "^2.0.0"
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@@ -6022,26 +6044,22 @@
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-      "version": "13.0.1",
-      "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-13.0.1.tgz",
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+      "version": "14.1.0",
+      "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-14.1.0.tgz",
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-        "entities": "~3.0.1",
-        "linkify-it": "^4.0.1",
-        "mdurl": "^1.0.1",
-        "uc.micro": "^1.0.5"
+        "entities": "^4.4.0",
+        "linkify-it": "^5.0.0",
+        "mdurl": "^2.0.0",
+        "punycode.js": "^2.3.1",
+        "uc.micro": "^2.1.0"
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@@ -6101,48 +6119,49 @@
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+      "version": "0.34.0",
+      "resolved": "https://registry.npmjs.org/markdownlint/-/markdownlint-0.34.0.tgz",
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       "requires": {
-        "markdown-it": "13.0.1",
-        "markdownlint-micromark": "0.1.5"
+        "markdown-it": "14.1.0",
+        "markdownlint-micromark": "0.1.9"
       }
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     "markdownlint-cli2": {
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-      "resolved": "https://registry.npmjs.org/markdownlint-cli2/-/markdownlint-cli2-0.8.1.tgz",
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+      "version": "0.13.0",
+      "resolved": "https://registry.npmjs.org/markdownlint-cli2/-/markdownlint-cli2-0.13.0.tgz",
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       "requires": {
-        "globby": "13.1.4",
-        "markdownlint": "0.29.0",
+        "globby": "14.0.1",
+        "js-yaml": "4.1.0",
+        "jsonc-parser": "3.2.1",
+        "markdownlint": "0.34.0",
         "markdownlint-cli2-formatter-default": "0.0.4",
-        "micromatch": "4.0.5",
-        "strip-json-comments": "5.0.0",
-        "yaml": "2.3.1"
+        "micromatch": "4.0.5"
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+          "version": "14.0.1",
+          "resolved": "https://registry.npmjs.org/globby/-/globby-14.0.1.tgz",
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-            "fast-glob": "^3.2.11",
-            "ignore": "^5.2.0",
-            "merge2": "^1.4.1",
-            "slash": "^4.0.0"
+            "@sindresorhus/merge-streams": "^2.1.0",
+            "fast-glob": "^3.3.2",
+            "ignore": "^5.2.4",
+            "path-type": "^5.0.0",
+            "slash": "^5.1.0",
+            "unicorn-magic": "^0.1.0"
           }
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-        "slash": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/slash/-/slash-4.0.0.tgz",
-          "integrity": "sha512-3dOsAHXXUkQTpOYcoAxLIorMTp4gIQr5IW3iVb7A7lFIp0VHhnynm9izx6TssdrIcVIESAlVjtnO2K8bg+Coew=="
-        },
-        "strip-json-comments": {
+        "path-type": {
           "version": "5.0.0",
-          "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-5.0.0.tgz",
-          "integrity": "sha512-V1LGY4UUo0jgwC+ELQ2BNWfPa17TIuwBLg+j1AA/9RPzKINl1lhxVEu2r+ZTTO8aetIsUzE5Qj6LMSBkoGYKKw=="
+          "resolved": "https://registry.npmjs.org/path-type/-/path-type-5.0.0.tgz",
+          "integrity": "sha512-5HviZNaZcfqP95rwpv+1HDgUamezbqdSYTyzjTvwtJSnIH+3vnbmWsItli8OFEndS984VT55M3jduxZbX351gg=="
+        },
+        "slash": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-5.1.0.tgz",
+          "integrity": "sha512-ZA6oR3T/pEyuqwMgAKT0/hAv8oAXckzbkmR0UkUosQ+Mc4RxGoJkRmwHgHufaenlyAgE1Mxgpdcrf75y6XcnDg=="
         }
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     },
@@ -6153,9 +6172,9 @@
       "requires": {}
     },
     "markdownlint-micromark": {
-      "version": "0.1.5",
-      "resolved": "https://registry.npmjs.org/markdownlint-micromark/-/markdownlint-micromark-0.1.5.tgz",
-      "integrity": "sha512-HvofNU4QCvfUCWnocQP1IAWaqop5wpWrB0mKB6SSh0fcpV0PdmQNS6tdUuFew1utpYlUvYYzz84oDkrD76GB9A=="
+      "version": "0.1.9",
+      "resolved": "https://registry.npmjs.org/markdownlint-micromark/-/markdownlint-micromark-0.1.9.tgz",
+      "integrity": "sha512-5hVs/DzAFa8XqYosbEAEg6ok6MF2smDj89ztn9pKkCtdKHVdPQuGMH7frFfYL9mLkvfFe4pTyAMffLbjf3/EyA=="
     },
     "marked": {
       "version": "4.3.0",
@@ -6168,9 +6187,9 @@
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     },
     "mdurl": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/mdurl/-/mdurl-1.0.1.tgz",
-      "integrity": "sha512-/sKlQJCBYVY9Ers9hqzKou4H6V5UWc/M59TH2dvkt+84itfnq7uFOMLpOiOS4ujvHP4etln18fmIxA5R5fll0g=="
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/mdurl/-/mdurl-2.0.0.tgz",
+      "integrity": "sha512-Lf+9+2r+Tdp5wXDXC4PcIBjTDtq4UKjCPMQhKIuzpJNW0b96kVqSwW0bT7FhRSfmAiFYgP+SCRvdrDozfh0U5w=="
     },
     "meow": {
       "version": "9.0.0",
@@ -6541,6 +6560,11 @@
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
       "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
     },
+    "punycode.js": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/punycode.js/-/punycode.js-2.3.1.tgz",
+      "integrity": "sha512-uxFIHU0YlHYhDQtV4R9J6a52SLx28BCjT+4ieh7IGbgwVJWO+km431c4yRlREUAsAmt/uMjQUyQHNEPf0M39CA=="
+    },
     "queue-microtask": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/queue-microtask/-/queue-microtask-1.2.3.tgz",
@@ -7147,9 +7171,14 @@
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     },
     "uc.micro": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-1.0.6.tgz",
-      "integrity": "sha512-8Y75pvTYkLJW2hWQHXxoqRgV7qb9B+9vFEtidML+7koHUFapnVJAZ6cKs+Qjz5Aw3aZWHMC6u0wJE3At+nSGwA=="
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-2.1.0.tgz",
+      "integrity": "sha512-ARDJmphmdvUk6Glw7y9DQ2bFkKBHwQHLi2lsaH6PPmz/Ka9sFOBsBluozhDltWmnv9u/cF6Rt87znRTPV+yp/A=="
+    },
+    "unicorn-magic": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/unicorn-magic/-/unicorn-magic-0.1.0.tgz",
+      "integrity": "sha512-lRfVq8fE8gz6QMBuDM6a+LO3IAzTi05H6gCVaUpir2E1Rwpo4ZUog45KpNXKC/Mn3Yb9UDuHumeFTo9iV/D9FQ=="
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     "uri-js": {
       "version": "4.4.1",
diff --git a/package.json b/package.json
index 7a2e480e..662acf34 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "indent-string": "^4.0.0",
     "markdown-link-check": "3.11.1",
     "markdown-toc": "^1.2.0",
-    "markdownlint-cli2": "^0.8.1",
+    "markdownlint-cli2": "^0.13.0",
     "marked": "^4.3.0",
     "prettier": "^2.4.1",
     "source-map-js": "^0.6.2",
diff --git a/spec/variables.md b/spec/variables.md
index c6801eff..e22ebfa4 100644
--- a/spec/variables.md
+++ b/spec/variables.md
@@ -9,9 +9,11 @@
 
 ## Syntax
 
+<!-- Escape the first `$` here due to DavidAnson/markdownlint#1262 -->
+
 <x><pre>
 **Variable**            ::= PlainVariable | NamespacedVariable
-**PlainVariable**       ::= '$' [\<ident-token>][]
+**PlainVariable**       ::= '\$' [\<ident-token>][]
 **NamespacedVariable**  ::= [\<ident-token>][] '.$' [PublicIdentifier][]
 **VariableDeclaration** ::= Variable ':' Expression ('!global' | '!default')*
 </pre></x>