patch 8.2.4855: robot files are not recognized

Problem:    Robot files are not recognized.
Solution:   Add patterns for robot files. (Zoe Roux, closes #10339)
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index c61fd0d..4f998f9 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -1592,6 +1592,9 @@
 " RPL/2
 au BufNewFile,BufRead *.rpl			setf rpl
 
+" Robot Framework
+au BufNewFile,BufRead *.robot,*.resource	setf robot
+
 " Robots.txt
 au BufNewFile,BufRead robots.txt		setf robots
 
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index f4bc02f..15a4a7b 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -457,6 +457,7 @@
     \ 'rib': ['file.rib'],
     \ 'rnc': ['file.rnc'],
     \ 'rng': ['file.rng'],
+    \ 'robot': ['file.robot', 'file.resource'],
     \ 'robots': ['robots.txt'],
     \ 'routeros': ['file.rsc'],
     \ 'rpcgen': ['file.x'],
diff --git a/src/version.c b/src/version.c
index 94c3470..b10da45 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4855,
+/**/
     4854,
 /**/
     4853,