doc/Makefile

--- a/doc/Makefile	Tue Apr 14 18:51:23 2020 -0400
+++ b/doc/Makefile	Wed Apr 15 22:18:05 2020 -0400
@@ -5,7 +5,7 @@
 	../mercurial/helptext/*.txt ../hgext/*.py ../hgext/*/__init__.py
 PREFIX=/usr/local
 MANDIR=$(PREFIX)/share/man
-INSTALL=install -c -m 644
+INSTALL=install -m 644
 PYTHON?=python
 RSTARGS=