diff -r 02fa567f8a3c -r 3e47d1ec9da5 mercurial/help.py
--- a/mercurial/help.py	Sat Mar 30 13:13:10 2019 -0700
+++ b/mercurial/help.py	Wed Mar 27 16:45:14 2019 +0100
@@ -37,6 +37,9 @@
 from .hgweb import (
     webcommands,
 )
+from .utils import (
+    compression,
+)
 
 _exclkeywords = {
     "(ADVANCED)",
@@ -428,7 +431,7 @@
     addtopichook(topic, add)
 
 addtopicsymbols('bundlespec', '.. bundlecompressionmarker',
-                util.bundlecompressiontopics())
+                compression.bundlecompressiontopics())
 addtopicsymbols('filesets', '.. predicatesmarker', fileset.symbols)
 addtopicsymbols('merge-tools', '.. internaltoolsmarker',
                 filemerge.internalsdoc)