message: Fix incorrect line split with CRLF eol
diff: @@ -136,10 +136,10 @@ export class SectionNodeProvider implements vscode.TreeDataProvider<Section> {
  if (!content) {
  return children
  }
  - content = utils.stripCommentsAndVerbatim(content)
  - const endPos = content.search(/\\end{document}/gm)
  + content = utils.stripCommentsAndVerbatim(content.replace(/\r\n|\r/g, '\n'))
  + const endPos = content.search(/\\end{document}/)
  content = content.substring(0, endPos > -1 ? endPos : undefined)
  - const startPos = content.search(/\\begin{document}/gm)
  + const startPos = content.search(/\\begin{document}/)
  let startLineNumber = 0
  if (startPos > -1) {
  startLineNumber = content.substring(0, startPos).split('\n').length
  