Cleanup test using Ember.$.trim

`String#replace(/\s+/g, '')` is the same as `Ember.$.trim`.
To simplify test code, I rewrite with the latter.
[DOC beta] Fix code highlight and add missing YUIDoc markup
Merge pull request #3979 from tricknotes/cleanup-tests

Cleanup test using Ember.$.trim
Merge pull request #3980 from tricknotes/fix-docs

[DOC beta] Fix code highlight and add missing YUIDoc markup
[DOC beta] Fix YUIdoc method names
[DOC beta] Fixes highlighting
[DOC beta] fixes for docs
[DOC beta] fixes formatting
Merge pull request #3984 from twokul/enumerable-fix

[DOC beta] Fixes highlighting
Merge pull request #3983 from twokul/mutable-array-fix

[DOC beta] fixes formatting
Merge pull request #3982 from twokul/mutable-array-fixes

[DOC beta] fixes for docs
Merge pull request #3975 from bradleypriest/patch-1

Fix YUIdoc method names
Changes documentation for observable.setProperties to clarify that observers will be buffered. This makes it consistent with
Merge pull request #3986 from MiguelMadero/set_properties_doc

Changes documentation for observable.setProperties to clarify that observers will be buffered.