message: Fix Only latex id at the beginning of a fenced block.
diff: {
  "fileTypes": [],
  - "injectionSelector": "L:markup.fenced_code.block.markdown",
  + "injectionSelector": "L:text.html.markdown",
  "patterns": [
  {
  - "include": "#latex-code-block"
  + "include": "#fenced_code_block_latex"
  }
  ],
  "repository": {
  - "latex-code-block": {
  - "begin": "latex(\\s+[^`~]*)?$",
  - "end": "(^|\\G)(?=\\s*[`~]{3,}\\s*$)",
  + "fenced_code_block_latex": {
  + "begin": "(^|\\G)(\\s*)(`{3,}|~{3,})\\s*(latex)\\s*$",
  + "name": "markup.fenced_code.block.markdown",
  + "end": "(^|\\G)(\\2|\\s{0,3})(\\3)\\s*$",
  + "beginCaptures": {
  + "3": {
  + "name": "punctuation.definition.markdown"
  + },
  + "4": {
  + "name": "fenced_code.block.language"
  + }
  + },
  + "endCaptures": {
  + "3": {
  + "name": "punctuation.definition.markdown"
  + }
  + },
  "patterns": [
  {
  "begin": "(^|\\G)(\\s*)(.*)",
  