Johan Walles 0e9d52bc41 [Informative VCS Prompt] Print failing exit codes
Before this change, if a command failed, this was indicated by the "$"
at the end of the prompt turning red.

With this change in place, if a command fails, the exit code of the
failing command is displayed in [square brackets].
2017-12-11 10:35:21 +01:00
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