succeed, it checks to see if any function in `auto-coding-functions'
gives a match.
-If a coding system is specifed, the return value is a cons
+If a coding system is specified, the return value is a cons
\(CODING . SOURCE), where CODING is the specified coding system and
SOURCE is a symbol `auto-coding-alist', `auto-coding-regexp-alist',
`:coding', or `auto-coding-functions' indicating by what CODING is