Support negative log filter syntax

By dnash... on August 16, 2013 17:44 (imported from Google Code)

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What steps will reproduce the problem?

1. go to log messages dialog of TortoiseGit
2. type a "username" and see the positive filter work
3. type "!username" and no results are displayed

What is the expected output? What do you see instead?
documentation 3.13.4. Filtering Log Messages says this should only show those entries which do not match. Nothing shows.

What version of TortoiseGit and msysgit are you using? On
what operating system?
TortoiseGit 1.8.4.0 (C:\Program Files\TortoiseGit\bin)
git version 1.7.10.msysgit.1 (C:\Program Files (x86)\Git\bin)
on Windows 7 Enterprize SP1 64 bit

Please provide any additional information below.
Have tried with and without the regular expression enabled
Have tried various columns enabled/disable and searched