patch 9.1.0492: filetype: Vim-script files not detected by shebang line

Problem:  Vim-script files may not be recognised
Solution: Add shebang line detection (Doug Kearns)

closes: #15012

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/autoload/dist/script.vim b/runtime/autoload/dist/script.vim
index f58899a..33ed7fd 100644
--- a/runtime/autoload/dist/script.vim
+++ b/runtime/autoload/dist/script.vim
@@ -229,6 +229,10 @@
   elseif name =~ '^execlineb\>'
     return 'execline'
 
+    # Vim
+  elseif name =~ '^vim\>'
+    return 'vim'
+
   endif
 
   return ''
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index c43eda7..d0a078f 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -994,6 +994,7 @@
             ['#!/path/regina']],
     janet:  [['#!/path/janet']],
     dart:   [['#!/path/dart']],
+    vim:    [['#!/path/vim']],
   }
 enddef
 
diff --git a/src/version.c b/src/version.c
index 5f7ea4c..abfcf3f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    492,
+/**/
     491,
 /**/
     490,