Bug 1561435 - Fix linting errors for taskcluster/, r=standard8

# ignore-this-changeset

Differential Revision: https://phabricator.services.mozilla.com/D35939

--HG--
extra : source : 66a5039f0298fc09b9e0ae4cf7455512c9028b8a
extra : intermediate-source : d8fe30f35fb43149b2b131fc3bc89c2f037f8464

taskcluster/docker/periodic-updates/scripts/genHPKPStaticPins.js

@@ -244,7 +244,7 @@ function downloadAndParseChromeCerts(filename, certNameToSKD, certSKDToName) {
           state = IN_PUB_KEY;
         } else {
           throw new Error(
-            "ERROR: couldn't parse Chrome certificate file " + "line: " + line
+            "ERROR: couldn't parse Chrome certificate file line: " + line
           );
         }
         break;