runtime(yaml): Fix flow mapping key detection
fixes: #15196
closes: #15313
Signed-off-by: itchyny <itchyny@cybozu.co.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/yaml.vim b/runtime/syntax/yaml.vim
index 6ec806a..e992bc0 100644
--- a/runtime/syntax/yaml.vim
+++ b/runtime/syntax/yaml.vim
@@ -129,7 +129,7 @@
execute 'syn match yamlPlainScalar /'.s:ns_plain_out.'/'
execute 'syn match yamlPlainScalar contained /'.s:ns_plain_in.'/'
-execute 'syn match yamlFlowMappingKey /'.s:ns_plain_in.'\%(\s\+'.s:ns_plain_in.'\)*\ze\s*:/ contained '.
+execute 'syn match yamlFlowMappingKey /'.s:ns_plain_in.'\%(\s\+'.s:ns_plain_in.'\)*\ze\s*:\%(\s\|$\)/ contained '.
\'nextgroup=yamlFlowMappingDelimiter skipwhite'
syn match yamlFlowMappingKeyStart /?/ contained nextgroup=@yamlFlowNode skipwhite
syn match yamlFlowMappingMerge /<<\ze\s*:/ contained nextgroup=yamlFlowMappingDelimiter skipwhite