Fixed merge request changes sticky container not spreading full width

app/assets/stylesheets/pages/issuable.scss

@@ -35,7 +35,7 @@
   .commit-box,
   .info-well,
   .commit-ci-menu,
-  .files-changed,
+  .files-changed-inner,
   .limited-header-width,
   .limited-width-notes {
     @extend .fixed-width-container;

app/views/projects/diffs/_diffs.html.haml

@@ -4,20 +4,21 @@
 - diff_files = diffs.diff_files
 .content-block.oneline-block.files-changed.diff-files-changed.js-diff-files-changed
-  .inline-parallel-buttons
-    - if !diffs_expanded? && diff_files.any? { |diff_file| diff_file.collapsed? }
-      = link_to 'Expand all', url_for(params.merge(expanded: 1, format: nil)), class: 'btn btn-default'
-    - if show_whitespace_toggle
-      - if current_controller?(:commit)
-        = commit_diff_whitespace_link(diffs.project, @commit, class: 'hidden-xs')
-      - elsif current_controller?('projects/merge_requests/diffs')
-        = diff_merge_request_whitespace_link(diffs.project, @merge_request, class: 'hidden-xs')
-      - elsif current_controller?(:compare)
-        = diff_compare_whitespace_link(diffs.project, params[:from], params[:to], class: 'hidden-xs')
-    .btn-group
-      = inline_diff_btn
-      = parallel_diff_btn
-  = render 'projects/diffs/stats', diff_files: diff_files
+  .files-changed-inner
+    .inline-parallel-buttons
+      - if !diffs_expanded? && diff_files.any? { |diff_file| diff_file.collapsed? }
+        = link_to 'Expand all', url_for(params.merge(expanded: 1, format: nil)), class: 'btn btn-default'
+      - if show_whitespace_toggle
+        - if current_controller?(:commit)
+          = commit_diff_whitespace_link(diffs.project, @commit, class: 'hidden-xs')
+        - elsif current_controller?('projects/merge_requests/diffs')
+          = diff_merge_request_whitespace_link(diffs.project, @merge_request, class: 'hidden-xs')
+        - elsif current_controller?(:compare)
+          = diff_compare_whitespace_link(diffs.project, params[:from], params[:to], class: 'hidden-xs')
+      .btn-group
+        = inline_diff_btn
+        = parallel_diff_btn
+    = render 'projects/diffs/stats', diff_files: diff_files
 - if render_overflow_warning?(diff_files)
   = render 'projects/diffs/warning', diff_files: diffs