grammar: support folding markers

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## 1.1.0
 
+NEW FEATURES:
+
+- Support folding markers for directives like `<source>...</source>`
+
 IMPROVEMENTS:
 
 - Add example Fluentd Configuration file using as many Fluentd features as possible even if they are not highlighted correctly

grammars/fluentd.cson

@@ -3,6 +3,8 @@ name: 'Fluentd Configuration'
 fileTypes: [
   'fluent.conf'
 ]
+foldingStartMarker: '<[^>]+>\\s*$'
+foldingStopMarker: '^\\s*</[^>]+>'
 patterns: [
   {
     match: "#.*"