patch 9.1.1342: Shebang filetype detection can be improved

Problem:  Shebang filetype detection can be improved
Solution: Improve detection logic (Eisuke Kawashima)

Vim does not correctly detect filetype from
  - `#!/usr/bin/env --split-string=awk -f`
  - `#!/usr/bin/env -S -i awk -f`
  - `#!/usr/bin/env -S VAR= awk -f`
So update the current detection logic to detect those cases.

closes: #17199

Signed-off-by: Eisuke Kawashima <e-kwsm@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index a7bb8bf..dc653f5 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -1073,10 +1073,10 @@
   return {
     perl: [['#!/usr/bin/env VAR=val perl']],
     scala: [['#!/usr/bin/env VAR=val VVAR=vval scala']],
-    awk: [['#!/usr/bin/env VAR=val -i awk']],
+    awk: [['#!/usr/bin/env --split-string=VAR= awk -vFS="," -f']],
     execline: [['#!/usr/bin/env execlineb']],
     scheme: [['#!/usr/bin/env VAR=val --ignore-environment scheme']],
-    python: [['#!/usr/bin/env VAR=val -S python -w -T']],
+    python: [['#!/usr/bin/env -S -i VAR=val python -B -u']],
     wml: [['#!/usr/bin/env VAR=val --split-string wml']],
     nix: [['#!/usr/bin/env nix-shell']],
   }
diff --git a/src/version.c b/src/version.c
index 8d88124..a07561e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1342,
+/**/
     1341,
 /**/
     1340,