D14270: CoffeeScript: fix templates in embedded JavaScript code & add escapes

[Nibaldo González]

nibags created this revision.
Restricted Application added projects: Kate, Frameworks.
Restricted Application added subscribers: kde-frameworks-devel, kwrite-devel.
nibags requested review of this revision.

REVISION SUMMARY
  In CoffeeScript, the character ` (grave accent) is used to insert JavaScript code, but in JavaScript that same character is used for templates. The templantes in embedded JavaScript code are done by prefixing backslashes, as mentioned in the CoffeeScript documentation [1].
  
  To do this I had to overwrite some JavaScript rules, since some contexts of `javascript.xml` contain` <IncludeRules context="Normal"/> `, where you can also insert templates.
  
  I also added the escapes supported by CoffeeScript, which are the same as JavaScript [2], with the exception of the octal escapes.
  
  All changes were tested using the CoffeeScript playground [3].
  
  References:
  
  - [1] CoffeeScript. Embedded JavaScript: https://coffeescript.org/#embedded
  - [2] JavaScript escapes: https://mathiasbynens.be/notes/javascript-escapes#unicode-code-point
  - [3] Try CoffeeScript: https://coffeescript.org/#try

REPOSITORY
  R216 Syntax Highlighting

BRANCH
  jsemb-coffeescript

REVISION DETAIL
  https://phabricator.kde.org/D14270

AFFECTED FILES
  autotests/folding/test.coffee.fold
  autotests/html/test.coffee.html
  autotests/input/test.coffee
  autotests/reference/test.coffee.ref
  data/syntax/coffee.xml

To: nibags
Cc: kwrite-devel, kde-frameworks-devel, michaelh, kevinapavew, ngraham, bruns, demsking, cullmann, sars, dhaumann
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