Update files/en-us/web/javascript/reference/global_objects/regexp/esc…

…ape/index.md

Co-authored-by: Kevin Gibbons <[email protected]>

files/en-us/web/javascript/reference/global_objects/regexp/escape/index.md

@@ -26,7 +26,7 @@ RegExp.escape(string)
 
 A new string that can be safely used as a literal pattern for the {{jsxref("RegExp/RegExp", "RegExp()")}} constructor. Namely, the following things in the input string are replaced:
 
-- The first character of the string, if it's either a decimal digit (0–9) or ASCII letter (a–z, A–Z), is escaped using the `\x` [character escape](/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_escape) syntax. For example, `RegExp.escape("foo")` returns `"\\x66oo"` (here and after, the two backslashes in a string literal denote a single backslash character). This step ensures that if this escaped string is embedded into a bigger pattern where it's immediately preceded by `\0`, `\c`, `\x0`, `\u000`, etc., the leading character doesn't get interpreted as part of the escape sequence.
+- The first character of the string, if it's either a decimal digit (0–9) or ASCII letter (a–z, A–Z), is escaped using the `\x` [character escape](/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_escape) syntax. For example, `RegExp.escape("foo")` returns `"\\x66oo"` (here and after, the two backslashes in a string literal denote a single backslash character). This step ensures that if this escaped string is embedded into a bigger pattern where it's immediately preceded by `\1`, `\x0`, `\u000`, etc., the leading character doesn't get interpreted as part of the escape sequence.
 - Regex [syntax characters](/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Literal_character#description), including `^`, `$`, `\`, `.`, `*`, `+`, `?`, `(`, `)`, `[`, `]`, `{`, `}`, and `|`, as well as the `/` delimiter, are escaped by inserting a `\` character before them. For example, `RegExp.escape("foo.bar")` returns `"\\x66oo\\.bar"`, and `RegExp.escape("(foo)")` returns `"\\(foo\\)"`.
 - Other punctuators, including `,`, `-`, `=`, `<`, `>`, `#`, `&`, `!`, `%`, `:`, `;`, `@`, `~`, `'`, `` ` ``, and `"`, are escaped using the `\x` syntax. For example, `RegExp.escape("foo-bar")` returns `"\\x66oo\\x2dbar"`. These characters cannot be escaped by prefixing with `\` because, for example, `/foo\-bar/u` is a syntax error.
 - The characters with their own [character escape](/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_escape) sequences: `\f` (U+000C FORM FEED), `\n` (U+000A LINE FEED), `\r` (U+000D CARRIAGE RETURN), `\t` (U+0009 CHARACTER TABULATION), and `\v` (U+000B LINE TABULATION), are replaced with their escape sequences. For example, `RegExp.escape("foo\nbar")` returns `"\\x66oo\\nbar"`.