escape comment chars in options regex

Author: jjallaire

src/core/lib/partition-cell-options.ts

@@ -256,7 +256,7 @@ export function langCommentChars(lang: string): string[] {
   }
 }
 export function optionCommentPattern(comment: string) {
-  return new RegExp("^" + comment + "\\s*\\| ?");
+  return new RegExp("^" + escapeRegExp(comment) + "\\s*\\| ?");
 }
 
 // FIXME this is an awkward spot for this particular entry point
@@ -314,3 +314,7 @@ export const kLangCommentChars: Record<string, string | [string, string]> = {
   dot: "//",
   ojs: "//",
 };
+
+function escapeRegExp(str: string) {
+  return str.replace(/[.*+?^${}()|[\]\\]/g, "\\$&"); // $& means the whole matched string
+}

src/resources/editor/tools/vs-code.mjs

@@ -27455,7 +27455,7 @@ function langCommentChars(lang) {
   }
 }
 function optionCommentPattern(comment) {
-  return new RegExp("^" + comment + "\\s*\\| ?");
+  return new RegExp("^" + escapeRegExp(comment) + "\\s*\\| ?");
 }
 var kLangCommentChars = {
   r: "#",
@@ -27500,6 +27500,9 @@ var kLangCommentChars = {
   dot: "//",
   ojs: "//"
 };
+function escapeRegExp(str2) {
+  return str2.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+}
 
 // ../parse-shortcode.ts
 function isBlockShortcode(content) {

src/resources/editor/tools/yaml/web-worker.js

@@ -465,7 +465,7 @@ def nb_cell_yaml_options(lang, cell):
 def nb_cell_yaml_lines(lang, source):
    # determine language comment chars
    comment_chars = nb_language_comment_chars(lang)
-   option_pattern = "^" + comment_chars[0] + "\\s*\\| ?"
+   option_pattern = "^" + re.escape(comment_chars[0]) + "\\s*\\| ?"
    option_suffix = comment_chars[1] if len(comment_chars) > 1 else None
 
    # go through the lines until we've found all of the yaml