message: Fix Highlight mpost environments as plain tex.
diff: ]
  },
  {
  + "begin": "(?:\\s*)((\\\\)begin)(\\{)(mpost[*]?)(\\})",
  + "captures": {
  + "1": {
  + "name": "support.function.be.latex"
  + },
  + "2": {
  + "name": "punctuation.definition.function.latex"
  + },
  + "3": {
  + "name": "punctuation.definition.arguments.begin.latex"
  + },
  + "4": {
  + "name": "variable.parameter.function.latex"
  + },
  + "5": {
  + "name": "punctuation.definition.arguments.end.latex"
  + }
  + },
  + "end": "((\\\\)end)(\\{)(\\4)(\\})(?:\\s*\\n)?",
  + "name": "meta.function.environment.latex.mpost"
  + },{
  "begin": "(?:\\s*)((\\\\)begin)(\\{)(\\w+[*]?)(\\})",
  "captures": {
  "1": {
  