Update runtime files
diff --git a/runtime/syntax/yaml.vim b/runtime/syntax/yaml.vim
index 626dc8a..49f7d04 100644
--- a/runtime/syntax/yaml.vim
+++ b/runtime/syntax/yaml.vim
@@ -3,6 +3,7 @@
" Maintainer: Nikolai Pavlov <zyx.vim@gmail.com>
" First author: Nikolai Weibull <now@bitwi.se>
" Latest Revision: 2015-03-28
+" removed duplicate yamlKeyValueDelimiter (pull #4799)
if exists('b:current_syntax')
finish
@@ -150,7 +151,6 @@
syn match yamlBlockMappingMerge /<<\ze\s*:\%(\s\|$\)/ nextgroup=yamlKeyValueDelimiter contained
syn match yamlKeyValueDelimiter /\s*:/ contained
-syn match yamlKeyValueDelimiter /\s*:/ contained
syn cluster yamlScalarWithSpecials contains=yamlPlainScalar,yamlBlockMappingKey,yamlFlowMappingKey