patch 9.0.2062: Janet files are not recognised

Problem:  Janet files are not recognised
Solution: Add filename and shebang detection (without
          adding an extra filetype plugin)

Those are used by the Janet language:
http://www.janet-lang.org

closes: #13400

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Doug Kearns <dougkearns@gmail.com>
diff --git a/runtime/autoload/dist/script.vim b/runtime/autoload/dist/script.vim
index fca5dcd..fd7b8e0 100644
--- a/runtime/autoload/dist/script.vim
+++ b/runtime/autoload/dist/script.vim
@@ -217,6 +217,10 @@
   elseif name =~ '^\%(rexx\|regina\)\>'
     return 'rexx'
 
+    # Janet
+  elseif name =~ '^janet\>'
+    return 'janet'
+
   endif
 
   return ''
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 07d6bbf..aa66bea 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -1034,6 +1034,9 @@
 " Jam
 au BufNewFile,BufRead *.jpl,*.jpr		setf jam
 
+" Janet
+au BufNewFile,BufRead *.janet			setf janet
+
 " Java
 au BufNewFile,BufRead *.java,*.jav		setf java
 
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index f68ad00..6b049af 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -335,6 +335,7 @@
     j: ['file.ijs'],
     jal: ['file.jal', 'file.JAL'],
     jam: ['file.jpl', 'file.jpr', 'JAM-file.file', 'JAM.file', 'Prl-file.file', 'Prl.file'],
+    janet: ['file.janet'],
     java: ['file.java', 'file.jav'],
     javacc: ['file.jj', 'file.jjt'],
     javascript: ['file.js', 'file.jsm', 'file.javascript', 'file.es', 'file.mjs', 'file.cjs'],
@@ -953,6 +954,7 @@
     crystal: [['#!/path/crystal']],
     rexx:   [['#!/path/rexx'],
             ['#!/path/regina']],
+    janet: [['#!/path/janet']],
   }
 enddef
 
diff --git a/src/version.c b/src/version.c
index a8de25a..67f39f2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2062,
+/**/
     2061,
 /**/
     2060,