Fix Gource avatar feature

[pmiossec]

by generating the avatars in the expected format by Gource:
i.e. authorname.png

The previously generated file were not found by Gource...

From Gource documentation:

    --user-image-dir DIRECTORY
            Directory containing .jpg or .png images of users
            (eg "Full Name.png") to use as avatars.

Screenshots

Before

After

Test methodology

• Manual

Test environment(s)

• Git Extensions 33.33.33
• Build dee83f5
• Git 2.25.0.windows.1 (recommended: 2.25.1 or later)
• Microsoft Windows NT 10.0.17134.0
• .NET Framework 4.8.4180.0
• DPI 168dpi (175% scaling)

[codecov]

Codecov Report

Merging #8322 into master will increase coverage by 0.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8322      +/-   ##
==========================================
+ Coverage   52.65%   52.82%   +0.17%     
==========================================
  Files         864      861       -3     
  Lines       62545    62244     -301     
  Branches    11201    11101     -100     
==========================================
- Hits        32930    32881      -49     
+ Misses      26991    26770     -221     
+ Partials     2624     2593      -31     

Flag	Coverage Δ
#production	40.81% <ø> (+0.15%)	⬆️
#tests	94.45% <ø> (ø)

[gerhardol]

Have not run it but it makes sense

[pmiossec]

@msftbot merge in 1 day

[ghost]

Hello @pmiossec!

Because you've given me some instructions on how to help merge this pull request, I'll be modifying my merge approach. Here's how I understand your requirements for merging this pull request:

• I won't merge this pull request until after the UTC date Thu, 16 Jul 2020 07:55:29 GMT, which is in 1 day

If this doesn't seem right to you, you can tell me to cancel these instructions and use the auto-merge policy that has been configured for this repository. Try telling me "forget everything I just told you".