(sh-is-quoted-p): New fun.

(sh-is-quoted-p): New fun.
(sh-font-lock-paren): Use it to allow \C in case patterns.
(sh-get-indent-info): Check the \n before the line for string-status.
(sh-feature): Remove unused var `function'.
(sh-get-indent-info): Remove unused variables.
(sh-prev-thing): Remove unused vars `going', `n', and `found'.
(sh-set-indent): Remove unused var `new-val' and `val0'.
(sh-learn-buffer-indent): Remove unused vars `last-pos' and `lines'.
(sh-guess-basic-offset): Remove unused var `return' and `j'.