diff -r c093cc6e6c99 -r 313e3a279828 hgext/remotefilelog/shallowutil.py
--- a/hgext/remotefilelog/shallowutil.py	Thu Nov 07 03:59:22 2019 -0800
+++ b/hgext/remotefilelog/shallowutil.py	Thu Nov 07 13:18:19 2019 -0500
@@ -260,9 +260,9 @@
             # v0, str(int(size)) is the header
             size = int(header)
     except ValueError:
-        raise RuntimeError(r"unexpected remotefilelog header: illegal format")
+        raise RuntimeError("unexpected remotefilelog header: illegal format")
     if size is None:
-        raise RuntimeError(r"unexpected remotefilelog header: no size found")
+        raise RuntimeError("unexpected remotefilelog header: no size found")
     return index + 1, size, flags