message: Fix Check if active pane has an editor before latex language checking
diff: @@ -172,7 +172,7 @@ export async function activate(context: vscode.ExtensionContext) {
  extension.manager.findRoot()
  }
  - if (extension.manager.isTex(e.document.fileName)) {
  + if (e && extension.manager.isTex(e.document.fileName)) {
  lintActiveFileIfEnabled(extension)
  }
  }))
  