Prefer user email match when looking for commit author

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/helpers/commits_helper.rb

@@ -125,7 +125,9 @@ module CommitsHelper
             source_name
           end
-    user = User.where('name like ? or email like ?', source_name, source_email).first
+    # Prefer email match over name match
+    user = User.where(email: source_email).first
+    user ||= User.where(name: source_name).first
     options = {
       class: "commit-#{options[:source]}-link has_tooltip",