[MERGE] Minor help fixes for add, commit, export

[Aaron Bentley]

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Ian Clatworthy wrote:
> Aaron,

> Thanks for this. I'll see what I can do (early next week) to turn that
> into a better help message for commit.

Here's another one, though I consider it a bug.

abentley at lappy:~$ bzr init foo
abentley at lappy:~$ mkdir foo/bar
abentley at lappy:~$ touch foo/bar/quxx
abentley at lappy:~$ bzr add foo
added bar
added bar/quxx
abentley at lappy:~$ bzr commit -m 'foo' foo
added bar
added bar/quxx
Committed revision 1.
abentley at lappy:~$ bzr remove foo/bar
abentley at lappy:~$ bzr add foo/bar
added bar
added bar/quxx
abentley at lappy:~$ bzr commit -m 'bar' foo/bar/quxx
added bar
added bar/quxx
bzr: ERROR: bar is already versioned

It succeeds if you specify bar instead:

abentley at lappy:~$ bzr commit -m 'bar' foo/bar
added bar
added bar/quxx
deleted bar
deleted bar/quxx
Committed revision 2.

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