Improve bash prompt to detect various states like an unfinished merge
This patch makes the git prompt (when enabled) show if a merge or a rebase is unfinished. It also detects if a bisect is being done as well as detached checkouts. An uncompleted git-am cannot be distinguised from a rebase (the non-interactive version). Instead of having an even longer prompt we simply ignore that and hope the power users that use git-am knows the difference. Signed-off-by: NRobin Rosenberg <robin.rosenberg@dewire.com> Acked-by: NShawn O. Pearce <spearce@spearce.org>
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