Replace #!/bin/sh' with #! /bin/sh', for benefit of systems

that interpret `#! /' as a 4-byte magic number.

lib-src/vcdiff

@@ -1,9 +1,9 @@
-#!/bin/sh
+#! /bin/sh
 #
 # Enhanced sccs diff utility for use with vc mode.
 # This version is more compatible with rcsdiff(1).
 #
-#	$Id: vcdiff,v 1.3 1993/08/25 08:18:56 eggert Exp eggert $
+#	$Id: vcdiff,v 1.4 1993/12/03 09:29:18 eggert Exp eggert $
 #
 
 DIFF="diff"