Merge branch 'patch-28' into 'master'

Replace one word in todos.md

See merge request gitlab-org/gitlab-ce!19757

doc/workflow/todos.md

@@ -14,7 +14,7 @@ in a simple dashboard.
 
 ---
 
-You can quickly access the Todos dashboard using the bell icon next to the
+You can quickly access the Todos dashboard using the checkmark icon next to the
 search bar in the upper right corner. The number in blue is the number of Todos
 you still have open if the count is < 100, else it's 99+. The exact number
 will still be shown in the body of the _To do_ tab.