Commits on Nov 12, 2019

1. (objectivec) Sync preprocessor highlighting with cpp …

   The objectivec highlighting had a few bugs and was missing a few
   features:
   
   - Expressions with < were misidentified as a string like <stdio.h>
     (fixes highlightjs#1964).
   
   - Keywords like if, else, endif, etc. were not highlighted.
   
   - The escape sequences in string literals were not parsed.
   
   - Line continuations were not parsed.
   
   - Comments were not parsed.
   
   Fix all these by adapting cpp's preprocessor definition. Pull in the
   preprocessor test from cpp. (This is actually objectivec's first markup
   test. It probably could do with tests beyond just this feature.)

   

   davidben committed Nov 12, 2019
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2. Switch to non-greedy .* per review comment

   

   davidben committed Nov 12, 2019
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3. Add changelog entry

   

   davidben committed Nov 12, 2019
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4. Merge branch 'master' into objc-preprocessor

   

   joshgoebel authored Nov 12, 2019
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