patch 7.4.737

Problem:    On MS-Windows vimgrep over arglist doesn't work (Issue 361)
Solution:   Only escape backslashes in ## expansion when it is not used as the
            path separator. (James McCoy)

src/ex_docmd.c

@@ -10746,7 +10746,11 @@ arg_all()
 		}
 		for ( ; *p != NUL; ++p)
 		{
-		    if (*p == ' ' || *p == '\\')
+		    if (*p == ' '
+#ifndef BACKSLASH_IN_FILENAME
+			    || *p == '\\'
+#endif
+			    )
 		    {
 			/* insert a backslash */
 			if (retval != NULL)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    737,
 /**/
     736,
 /**/