patch 8.2.3374: Pyret files are not recognized

Problem:    Pyret files are not recognized.
Solution:   Recognize .arr files as Pyret. (Doug Kearns)
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 70b647b..6144b5f 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -1383,6 +1383,9 @@
 " Protocols
 au BufNewFile,BufRead */etc/protocols		setf protocols
 
+" Pyret
+au BufNewFile,BufRead *.arr			setf pyret
+
 " Pyrex
 au BufNewFile,BufRead *.pyx,*.pxd		setf pyrex
 
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 5463c1c..a30ac2c 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -397,6 +397,7 @@
     \ 'psf': ['file.psf'],
     \ 'psl': ['file.psl'],
     \ 'puppet': ['file.pp'],
+    \ 'pyret': ['file.arr'],
     \ 'pyrex': ['file.pyx', 'file.pxd'],
     \ 'python': ['file.py', 'file.pyw', '.pythonstartup', '.pythonrc', 'file.ptl', 'file.pyi', 'SConstruct'],
     \ 'quake': ['anybaseq2/file.cfg', 'anyid1/file.cfg', 'quake3/file.cfg', 'baseq2/file.cfg', 'id1/file.cfg', 'quake1/file.cfg', 'some-baseq2/file.cfg', 'some-id1/file.cfg', 'some-quake1/file.cfg'],
diff --git a/src/version.c b/src/version.c
index 9a1281f..0630ae6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3374,
+/**/
     3373,
 /**/
     3372,