Web Inspector: Add PrettyPrinter CSS tests

Web Inspector: Add PrettyPrinter CSS tests
https://bugs.webkit.org/show_bug.cgi?id=134005

Patch by Joseph Pecoraro <pecoraro@apple.com> on 2014-10-04
Reviewed by Timothy Hatcher.

Add CSS pretty printing tests. Improve pretty printing of calc()
expressions and media-queries with whitespace around operators
and keywords. Also fix the debug output in the tool for CSS.

* Tools/PrettyPrinting/CodeMirrorFormatters.js:
* Tools/PrettyPrinting/FormatterContentBuilder.js:
(FormatterContentBuilder.prototype._appendIndent):
* Tools/PrettyPrinting/FormatterDebug.js:
(.debugToken):
(Formatter.prototype.debug):
* Tools/PrettyPrinting/css-tests/basic-expected.css: Added.
* Tools/PrettyPrinting/css-tests/basic.css: Added.
* Tools/PrettyPrinting/css-tests/calc-expected.css: Added.
* Tools/PrettyPrinting/css-tests/calc.css: Added.
* Tools/PrettyPrinting/css-tests/media-query-expected.css: Added.
* Tools/PrettyPrinting/css-tests/media-query.css: Added.
* Tools/PrettyPrinting/css-tests/selectors-expected.css: Added.
* Tools/PrettyPrinting/css-tests/selectors.css: Added.
* Tools/PrettyPrinting/index.html:
* UserInterface/Views/CodeMirrorFormatters.js:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@174323 268f45cc-cd09-0410-ab3c-d52691b4dbfc