help-xref-mule-regexp-template
help-xref-mule-regexp-template is a variable defined in `mule-cmds.el
'.
Its value is "\\(\\<\\(\\(coding system\\)\\|\\(input method\\)\\|\\(character set\\)\\|\\(charset\\)\\)\\s-+\\)?`\\(\\sw\\(\\sw\\|\\s_\\)+\\)'"
- This variable may be risky if used as a file-local variable.