[PATCH] Proper error message when specifying empty commit message

[Tristan Seligmann]

* Nir Soffer <nirs at actcom.net.il> [2005-09-07 15:42:47 +0300]:

> On 7 Sep, 2005, at 14:55, Robert Collins wrote:
> 
> >I agree with Michaels suggestion of len(msg.strip()) == 0 as the test.
> 
> A more readable test is msg.isspace()

Not quite; "".isspace() returns False
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