--- a/mercurial/changegroup.py	Tue Oct 08 15:15:37 2019 -0700
+++ b/mercurial/changegroup.py	Tue Oct 08 15:06:18 2019 -0700
@@ -1551,7 +1551,7 @@
 
     if version == b'01' and not matcher.always():
         raise error.ProgrammingError(
-            b'version 01 changegroups do not support ' b'sparse file matchers'
+            b'version 01 changegroups do not support sparse file matchers'
         )
 
     if ellipses and version in (b'01', b'02'):