Git: Change pretty format default from email to medium

Change-Id: Ia8700145a77dc74568c0fc19a288e32550357457
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/git/gitsettings.cpp

@@ -69,7 +69,7 @@ GitSettings::GitSettings()
     declareKey(diffPatienceKey, true);
     declareKey(winSetHomeEnvironmentKey, false);
     declareKey(gitkOptionsKey, QString());
-    declareKey(showPrettyFormatKey, 5);
+    declareKey(showPrettyFormatKey, 2);
 }
 
 QString GitSettings::gitBinaryPath(bool *ok, QString *errorMessage) const