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9c6654a316935ab097ccf462d506c02626373f0a by Tom Manshreck <shreck@google.com>:

Update comment on CUnescape() to note on failure it leaves its output param in an unspecified state.

PiperOrigin-RevId: 210956338
GitOrigin-RevId: 9c6654a316935ab097ccf462d506c02626373f0a
Change-Id: Icf0aea66afb413a0334df27960f75387087c6629