Archive, multitagging, cleanup

Cleaned up the current snippets for consistency and minor problems, added multiple tags to most of them, archived a few.

snippets/escapeRegExp.md

@@ -2,7 +2,7 @@
 
 Escapes a string to use in a regular expression.
 
-Use `replace()` to escape special characters.
+Use `String.replace()` to escape special characters.
 
 ```js
 const escapeRegExp = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');