git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/Documentation/Makefile b/Documentation/Makefile
index 7a325462ee84ec030e54b1f9e25b514e01a8ead8..43781fb2486eefb09d9249150c15e286a3668b55 100644 (file)
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -45,6 +45,7 @@ man7dir=$(mandir)/man7
 
 ASCIIDOC=asciidoc
 ASCIIDOC_EXTRA =
+MANPAGE_XSL = callouts.xsl
 INSTALL?=install
 RM ?= rm -f
 DOC_REF = origin/man
@@ -65,6 +66,7 @@ ASCIIDOC_EXTRA += -a asciidoc7compatible
 endif
 ifdef DOCBOOK_XSL_172
 ASCIIDOC_EXTRA += -a docbook-xsl-172
+MANPAGE_XSL = manpage-1.72.xsl
 endif
 
 #
@@ -159,7 +161,7 @@ $(MAN_HTML): %.html : %.txt
 
 %.1 %.5 %.7 : %.xml
        $(RM) $@
-       xmlto -m callouts.xsl man $<
+       xmlto -m $(MANPAGE_XSL) man $<
 
 %.xml : %.txt
        $(RM) $@+ $@