add concluding sentence

external/contribute/web-ide/web-ide.md

@@ -80,4 +80,7 @@ Good practice is to select `Delete source branch when merge request is accepted.
 
 Under `Changes`, you can see the added line:
 
-<img src="img/img11.png">
\ No newline at end of file
+<img src="img/img11.png">
+
+All that is left now is to submit the merge request by clicking on `Submit merge request`. That is it.
+