; Remove various duplicated words

; Remove various duplicated words

* doc/lispref/searching.texi (Extending Rx):
* doc/lispref/strings.texi (Creating Strings):
* doc/misc/modus-themes.org (Measure color contrast (DIY)):
* etc/NEWS:
* lisp/find-file.el (ff-find-other-file):
* lisp/gnus/gnus-group.el (gnus-group-suspend):
* lisp/progmodes/cc-langs.el (c-ml-string-any-closer-re):
* lisp/progmodes/flymake.el (flymake-list-only-diagnostics):
* lisp/progmodes/xref.el (xref--group-name-for-display):
* lisp/transient.el (transient-child, transient-files)
(transient-infix-value):
* src/alloc.c:
* src/regex-emacs.c (regex_compile):

Remove duplicate words in comments, documentation etc.