Normalize email with capital letters when calculating gravatar hash

By Alexey.Vorotni... on January 14, 2014 11:44 (imported from Google Code)

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What steps will reproduce the problem?

1. Create a gravatar for an email with capital letters.
2. Commit to GIT with this email.
3. Enable gravatars in TortoiseGit settings.
4. Show log.

What is the expected output?
Log shows correct gravatar.

What do you see instead?
Log shows "default" gravatar.

What version of TortoiseGit and msysgit are you using? On
what operating system?
TortoiseGit v 1.8.6.0
git version 1.8.4.msysgit.0
Windows 7 SP1 64 bit.

Please provide any additional information below.
According Gravatar doc http://en.gravatar.com/site/implement/hash email must be trimmed and lower-cased before MD5 hashing.