plan9: mkfile and 9diff fixes

This patch deals with an unnecessary backslash in 9diff and improper
quoting in the contrib mkfile.

contrib/plan9/9diff

@@ -3,13 +3,13 b''
 
 rfork e
 
-fn getfiles{
-	cd $1 && \
+fn getfiles {
+	cd $1 &&
 	for(f in `{du -as | awk '{print $2}'})
 		test -f $f && echo `{cleanname $f}
 }
 
-fn usage{
+fn usage {
 	echo >[1=2] usage: 9diff [diff options] parent child root
 	exit usage
 }

contrib/plan9/mkfile

@@ -29,9 +29,9 b' install:VQ:\tbuild'
 		cd $ROOT
 		$SH -c '$PYTHON setup.py $PURE install \
 			--install-scripts $PYTHONBIN \
-			--skip-build' \
-			--force
+			--skip-build \
+			--force'
 	}
 	mkdir -p /lib/mercurial/hgrc.d
-	dircp hgrc.d /lib/mercurial/hgrc.d
-	cp 9diff /rc/bin
+	dircp hgrc.d /lib/mercurial/hgrc.d/
+	cp 9diff /rc/bin/