Bash __git_ps1 line wrapping issue on OSX

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I have sourced git-prompt.sh (copied from
https://github.com/git/git/tree/master/contrib/completion) and included it
in my .bashrc as follows:

GIT_PS1_SHOWDIRTYSTATE=true;
GIT_PS1_SHOWUPSTREAM="verbose";
GIT_PS1_SHOWCOLORHINTS=true;

PROMPT_COMMAND='__git_ps1 "# \u@\h:\w" " \$ "';

Under CentOS etc. this works fine. On OSX however, when dealing with a
nested folder structure that causes line wrapping, the formatting of the bit
where you type goes do-lally-tap.  Character spacing is wrong (like each
character is tab separated) and once it hits the end of the line it starts
to overwrite itself (but only the last character).  There is a screen shot
of the issue on the StackOverflow question I've asked about this at
http://stackoverflow.com/questions/31561969/bash-git-ps1-line-wrapping-issue-on-osx.

The code that __git_ps1 has generated for PS1 is:

# \u@\h:\w (\[\e[32m\]${__git_ps1_branch_name}\[\e[0m\] \[\e[31m\]*\[\e[0m\]
u=) $

Has anyone experienced this and / or could suggest a solution?

If I comment out the GIT_PS1_SHOWCOLORHINTS directive it works, albeit
without the colour highlighting, so I'm guessing there is something amiss in
the control sequences somewhere.

Thanks,


Adam M.

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