CE upstream

CE changes https://gitlab.com/gitlab-org/gitlab-ce/compare/d636efbe26ee51030bb108d889c2ef867570358a...0c36b810abede73b3cf59f951e7467dbac54ec98?expand_all_diffs=1

app/controllers/projects/network_controller.rb

@@ -12,7 +12,9 @@ def show
     respond_to do |format|
       format.html do
-        flash.now[:alert] = "Git revision '#{params[:extended_sha1]}' does not exist." if params[:extended_sha1].present? && !@commit
+        if params[:extended_sha1].present? && !@commit
+          flash.now[:alert] = "Git revision '#{params[:extended_sha1]}' does not exist."
+        end
       end
       format.json do