Fix @findex and @vindex entries in manuals

Fix @findex and @vindex entries in manuals

* doc/emacs/building.texi:
* doc/emacs/calendar.texi:
* doc/emacs/cmdargs.texi:
* doc/emacs/mini.texi:
* doc/emacs/misc.texi:
* doc/emacs/trouble.texi:
* doc/emacs/windows.texi:
* doc/lispintro/emacs-lisp-intro.texi:
* doc/lispref/edebug.texi:
* doc/lispref/frames.texi:
* doc/lispref/os.texi:
* doc/lispref/windows.texi:
* doc/misc/cc-mode.texi:
* doc/misc/dired-x.texi:
* doc/misc/ediff.texi:
* doc/misc/mh-e.texi:
* doc/misc/pcl-cvs.texi:
* doc/misc/reftex.texi:
* doc/misc/sc.texi:
* doc/misc/vhdl-mode.texi:
* doc/misc/viper.texi: Fix @findex and @vindex entries.