doc/Makefile: Don't show Makefile comments in output

The comments makes sense when editing Makefile, but not when watching its
output where it looks too much like error messages.

doc/Makefile

@@ -1,50 +1,50 b''
 SOURCES=$(wildcard *.[0-9].txt)
 MAN=$(SOURCES:%.txt=%)
 HTML=$(SOURCES:%.txt=%.html)
 PREFIX=/usr/local
 MANDIR=$(PREFIX)/share/man
 INSTALL=install -c -m 644
 PYTHON=python
 RST2HTML=rst2html
 RST2MAN=rst2man
 
 all: man html
 
 man: $(MAN)
 
 html: $(HTML)
 
 hg.1.txt: hg.1.gendoc.txt
 	touch hg.1.txt
 
 hg.1.gendoc.txt: gendoc.py ../mercurial/commands.py ../mercurial/help.py
 	${PYTHON} gendoc.py > $@
 
 %: %.txt common.txt
 	$(RST2MAN) $*.txt > $*.tmp
-	# add newline after all literal blocks and fix backslash escape
+# add newline after all literal blocks and fix backslash escape
 	sed \
 	  -e 's/^\.fi$$/.fi\n/' \
 	  -e 's/\\fB\\\\fP/\\fB\\e\\fP/' \
 	  $*.tmp > $*
 	rm $*.tmp
 
 %.html: %.txt common.txt
 	$(RST2HTML) $*.txt > $*.html
 
 MANIFEST: man html
-	# tracked files are already in the main MANIFEST
+# tracked files are already in the main MANIFEST
 	$(RM) $@
 	for i in $(MAN) $(HTML) hg.1.gendoc.txt; do \
 	  echo "doc/$$i" >> $@ ; \
 	done
 
 install: man
 	for i in $(MAN) ; do \
 	  subdir=`echo $$i | sed -n 's/^.*\.\([0-9]\)$$/man\1/p'` ; \
 	  mkdir -p $(DESTDIR)$(MANDIR)/$$subdir ; \
 	  $(INSTALL) $$i $(DESTDIR)$(MANDIR)/$$subdir ; \
 	done
 
 clean:
 	$(RM) $(MAN) $(MAN:%=%.html) *.[0-9].gendoc.txt MANIFEST