chromite: Lint fixes.

Fix `W1404: Implicit string concatenation found in assignment`.
Reformatting the files caused some single line implicit
concatenations that were previously multiple lines. Fix all
instances.

e.g. foo = "bar " "baz" -> foo = "bar baz"

BUG=b:233893248
TEST=run_tests, CQ

Change-Id: I372e3d3eb8fe0bc4ef1714533e15a4acfa081b8b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3887924
Reviewed-by: Sloan Johnson <sloanjohnson@google.com>
Auto-Submit: Alex Klein <saklein@chromium.org>
Tested-by: Alex Klein <saklein@chromium.org>
Commit-Queue: Alex Klein <saklein@chromium.org>
diff --git a/scripts/repo_sync_manifest_unittest.py b/scripts/repo_sync_manifest_unittest.py
index dcb61b3..41dc775 100644
--- a/scripts/repo_sync_manifest_unittest.py
+++ b/scripts/repo_sync_manifest_unittest.py
@@ -23,10 +23,10 @@
     EXT_MANIFEST_URL = "https://chromium.googlesource.com/chromiumos/manifest"
 
     MV_INT_URL = (
-        "https://chrome-internal.googlesource.com/chromeos/" "manifest-versions"
+        "https://chrome-internal.googlesource.com/chromeos/manifest-versions"
     )
     MV_EXT_URL = (
-        "https://chromium.googlesource.com/chromiumos/" "manifest-versions"
+        "https://chromium.googlesource.com/chromiumos/manifest-versions"
     )
 
     def setUp(self):