Bug 1928027 - fix ycm_extra_conf.py according to ../mach commlint --fix. r=freaktechnik

Differential Revision: https://phabricator.services.mozilla.com/D227326

--HG--
extra : moz-landing-system : lando

.ycm_extra_conf.py

@@ -2,7 +2,9 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-import imp, os, sys
+import imp
+import os
+import sys
 
 old_bytecode = sys.dont_write_bytecode
 sys.dont_write_bytecode = True