Quoting fixes in lisp/international and lisp/leim

Quoting fixes in lisp/international and lisp/leim

* lisp/international/ccl.el (ccl-dump, ccl-dump-call):
* lisp/international/ja-dic-utl.el (skkdic-lookup-key):
* lisp/international/mule-cmds.el:
(select-safe-coding-system-interactively, leim-list-file-name):
* lisp/international/quail.el (quail-use-package, quail-help):
* lisp/international/titdic-cnv.el (tit-process-header)
(miscdic-convert):
Respect text quoting style in doc strings and diagnostics.
* lisp/international/quail.el (lisp/international/quail.el):
* lisp/leim/quail/ethiopic.el ("ethiopic"):
Escape apostrophes in doc strings.