Merge branch 'jk/contrib-subtree-make-all'

* jk/contrib-subtree-make-all:
  subtree: make "all" default target of Makefile

Author: gitster

contrib/subtree/Makefile

@@ -1,3 +1,6 @@
+# The default target of this Makefile is...
+all::
+
 -include ../../config.mak.autogen
 -include ../../config.mak
 
@@ -34,7 +37,7 @@ GIT_SUBTREE_XML := git-subtree.xml
 GIT_SUBTREE_TXT := git-subtree.txt
 GIT_SUBTREE_HTML := git-subtree.html
 
-all: $(GIT_SUBTREE)
+all:: $(GIT_SUBTREE)
 
 $(GIT_SUBTREE): $(GIT_SUBTREE_SH)
 	sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' $< >$@