message: fix regex for illegal chars
diff: },
  {
  "name": "text.tex.latex.rsweave.codeblock",
  - "begin": "^(\\s*?)(<<)(.*?)(>>=)\\s*?(\\S*?)\\s*?\\n",
  - "end": "^\\1(@)\\s*?(\\S*?)\\s*?\\n",
  + "begin": "^(\\s*?)(<<)(.*?)(>>=)\\s*(.+)?\\s*\\n",
  + "end": "^\\1(@)\\s*(.+)?\\s*\\n",
  "endCaptures": {
  "1": {
  "name": "meta.tag.rsweave"
  