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Alan Mackenzie authored
In particular, with these unterminated quotes on each of two adjacent lines, the following text was spuriously fontified with string face. * lisp/progmodes/cc-defs.el (c-search-backward-char-property-with-value-on-char): New macro. * lisp/progmodes/cc-mode.el (c-clear-string-fences): Check whether there is an unmatched quote at a lower buffer position which should match the current quote, rather than wrongly assuming the latter is unmatched and marking it with a punctuation syntax. (c-font-lock-fontify-region): Ensure all pertinent parts of the buffer have string fence properties applied before performing any syntactic operations on it; in particular, this applies to a quote at an earlier buffer position which "matches" one inside the region about to be fontified.
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