--- a/hgext/remotefilelog/__init__.py	Wed Jul 19 13:17:49 2017 -0700
+++ b/hgext/remotefilelog/__init__.py	Wed Apr 03 11:21:27 2019 -0700
@@ -804,7 +804,7 @@
         return
 
     reposfile = open(repospath, 'rb')
-    repos = set([r[:-1] for r in reposfile.readlines()])
+    repos = {r[:-1] for r in reposfile.readlines()}
     reposfile.close()
 
     # build list of useful files