Support quotes 'like this' in info files
This is possible when 'makeinfo --disable-encoding' is used in Texinfo 5. * lisp/calc/calc-help.el (calc-describe-thing): * lisp/gnus/gnus-art.el (gnus-button-alist): * lisp/info.el (Info-find-index-name): * lisp/vc/ediff-help.el (ediff-help-for-quick-help): Also support quotes 'like this'. * lisp/calc/calc-help.el (calc-describe-thing): Simplify. * lisp/finder.el (finder-font-lock-keywords): Remove var that hasn't been used in years, instead of bothering to fix its quoting.
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