Merge branch 'replace-all-snake-case-in-scss-variables' into 'master'

app/assets/stylesheets/framework/avatar.scss

app/assets/stylesheets/framework/forms.scss

app/assets/stylesheets/framework/highlight.scss

app/assets/stylesheets/framework/jquery.scss

app/assets/stylesheets/framework/mixins.scss

app/assets/stylesheets/framework/sidebar.scss

app/assets/stylesheets/framework/typography.scss

app/assets/stylesheets/framework/variables.scss

app/assets/stylesheets/mailers/highlighted_diff_email.scss

app/assets/stylesheets/pages/boards.scss

app/assets/stylesheets/pages/commits.scss

app/assets/stylesheets/pages/cycle_analytics.scss

app/assets/stylesheets/pages/diff.scss

app/assets/stylesheets/pages/editor.scss

app/assets/stylesheets/pages/environments.scss

app/assets/stylesheets/pages/issuable.scss

app/assets/stylesheets/pages/merge_conflicts.scss

app/assets/stylesheets/pages/merge_requests.scss

app/assets/stylesheets/pages/note_form.scss

app/assets/stylesheets/pages/notes.scss