fixed points from comments to improve code quality

app/assets/stylesheets/pages/tree.scss

@@ -32,6 +32,10 @@
       .last-commit {
         @include str-truncated(506px);
+        .fa-angle-right {
+          margin-left: 5px;
+        }
+
         @media (min-width: $screen-md-min) and (max-width: $screen-md-max) {
           @include str-truncated(450px);
         }

app/views/projects/tree/_tree_content.html.haml

@@ -7,15 +7,12 @@
           %th.hidden-xs
             .pull-left Last commit
             .last-commit.hidden-sm.pull-left
-               
               %i.fa.fa-angle-right
-               
               %small.light
                 = link_to @commit.short_id, namespace_project_commit_path(@project.namespace, @project, @commit), class: "monospace"
                 = clipboard_button(clipboard_text: @commit.id, title: "Copy commit SHA to clipboard")
                 = time_ago_with_tooltip(@commit.committed_date)
-                :plain
-                   -
+                \-
                 = @commit.full_title
             %small.commit-history-link-spacer |
             = link_to 'History', namespace_project_commits_path(@project.namespace, @project, @id), class: 'commit-history-link'