Mark keys consistently in manuals

Mark keys consistently in manuals

* doc/emacs/killing.texi:
* doc/lispintro/emacs-lisp-intro.texi:
* doc/misc/calc.texi:
* doc/misc/cc-mode.texi:
* doc/misc/dired-x.texi:
* doc/misc/ede.texi:
* doc/misc/edt.texi:
* doc/misc/efaq.texi:
* doc/misc/erc.texi:
* doc/misc/eshell.texi:
* doc/misc/gnus-faq.texi:
* doc/misc/gnus-news.texi:
* doc/misc/idlwave.texi:
* doc/misc/ido.texi:
* doc/misc/mairix-el.texi:
* doc/misc/message.texi:
* doc/misc/mh-e.texi:
* doc/misc/newsticker.texi:
* doc/misc/org.texi:
* doc/misc/pcl-cvs.texi:
* doc/misc/ses.texi:
* doc/misc/sieve.texi:
* doc/misc/smtpmail.texi:
* doc/misc/speedbar.texi:
* doc/misc/srecode.texi:
* doc/misc/vhdl-mode.texi:
* doc/misc/vip.texi:
* doc/misc/viper.texi: Mark keys consistently.