Split a long line and tweak for font-lock mode.

tests/basename/basic

@@ -1,19 +1,19 @@
 #!/bin/sh
-# This is really a -*-perl-*- script
+# -*-perl-*-
 
 : ${PERL=perl}
 : ${srcdir=.}
 
 case "$PERL" in
-  *'missing perl')
-  echo 1>&2 "$0: configure didn't find a usable version of Perl,"
-    "so can't run this test"
-  # '
-  exit 77
-  ;;
+  *missing\ perl)
+    echo 1>&2 "$0: configure didn't find a usable version of Perl," \
+      "so can't run this test"
+    exit 77
+    ;;
 esac
 
-exec $PERL -w -I$srcdir/.. -MFetish -- - << \EOF
+d=$srcdir/..
+exec $PERL -w -I$d -MFetish -- - << \EOF
 require 5.003;
 use strict;