[PATCH v2 1/4] Documentation/Makefile: de-duplicate *.[157] dependency list

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Use the "DOC_MAN[157]" variables combined into a new "DOC_MANN" to
declare that e.g. "git-am.1" depends on "manpage-base-url.xsl"
etc. This change helps to make a subsequent change smaller.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 Documentation/Makefile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/Makefile b/Documentation/Makefile
index 5e1a7f655c2..d239f6751f0 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -129,9 +129,13 @@ ARTICLES_HTML += $(patsubst %,%.html,$(ARTICLES) $(SP_ARTICLES))
 HTML_FILTER ?= $(ARTICLES_HTML) $(OBSOLETE_HTML)
 DOC_HTML = $(MAN_HTML) $(filter $(HTML_FILTER),$(ARTICLES_HTML) $(OBSOLETE_HTML))
 
+DOC_MANN =
 DOC_MAN1 = $(patsubst %.txt,%.1,$(filter $(MAN_FILTER),$(MAN1_TXT)))
+DOC_MANN += $(DOC_MAN1)
 DOC_MAN5 = $(patsubst %.txt,%.5,$(filter $(MAN_FILTER),$(MAN5_TXT)))
+DOC_MANN += $(DOC_MAN5)
 DOC_MAN7 = $(patsubst %.txt,%.7,$(filter $(MAN_FILTER),$(MAN7_TXT)))
+DOC_MANN += $(DOC_MAN7)
 
 prefix ?= $(HOME)
 bindir ?= $(prefix)/bin
@@ -351,7 +355,8 @@ $(OBSOLETE_HTML): %.html : %.txto $(ASCIIDOC_DEPS)
 manpage-base-url.xsl: manpage-base-url.xsl.in
 	$(QUIET_GEN)sed "s|@@MAN_BASE_URL@@|$(MAN_BASE_URL)|" $< > $@
 
-%.1 %.5 %.7 : %.xml manpage-base-url.xsl $(wildcard manpage*.xsl)
+$(DOC_MANN): manpage-base-url.xsl $(wildcard manpage*.xsl)
+%.1 %.5 %.7 : %.xml
 	$(QUIET_XMLTO)$(XMLTO) -m $(MANPAGE_XSL) $(XMLTO_EXTRA) man $<
 
 %.xml : %.txt $(ASCIIDOC_DEPS)
-- 
2.39.0.rc0.993.g0c499e58e3b