Strip compound assignments, eg, "foo.stripMe.bar = bam".
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=44414453
Make AngularPassTest spacing consistent with other jscomp tests.

This should also make it slightly clearer where expressions end to make
it harder to accidentally add a stray semicolon.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=44420863