tree ba9207a346c399b5dd52b4391603849a317128ed
parent 32a84b27e28ab9f681f0df16160c4ef1f6587094
author Joe Tsai <joetsai@digital-static.net> 1526076997 -0700
committer GitHub <noreply@github.com> 1526076997 -0700
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proto: adjust documentation on RequiredNotSetError (#603)

The new table-drive unmarshaler never emits "{Unknown}",
so that comment is stale.

Also, there is no reason to document that the name of "first" missing
required field is stored:
* There is no programmatic way to access this field, so it is just for user debugging.
* "First" is not well defined. First encounted while parsing? First listed in proto file? First listed in the Go struct?