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fa1db7d81a
If the `drop_characters` or `suffix_separators` options are set to "", currently instead of the empty string, their default value is used instead. This is a bug, and it also happens on other config options, but because the others have to be set in order for chasquid to function, it's not a problem in practice. Thanks Björn Busse (bbusse@github) for finding and reporting this problem, on irc and in https://github.com/albertito/chasquid/issues/25. This patch fixes the problem by marking these fields explicitly optional, which enables presence testing, as described in the protobuf documentation: https://github.com/protocolbuffers/protobuf/blob/master/docs/field_presence.md.