patch 8.2.2591: Poke files are not recognized

Problem:    Poke files are not recognized.
Solution:   Add a filetype entry. (Matt Ihlenfield)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index ba8879c..11b6bae 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -374,6 +374,7 @@
     \ 'po': ['file.po', 'file.pot'],
     \ 'pod': ['file.pod'],
     \ 'pod6': ['file.pod6'],
+    \ 'poke': ['file.pk'],
     \ 'postscr': ['file.ps', 'file.pfa', 'file.afm', 'file.eps', 'file.epsf', 'file.epsi', 'file.ai'],
     \ 'pov': ['file.pov'],
     \ 'povini': ['.povrayrc'],
diff --git a/src/version.c b/src/version.c
index 1eecf5d..76a95b9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2591,
+/**/
     2590,
 /**/
     2589,