message: [contour] capture: message wording cleanup.
diff: @@ -247,7 +247,7 @@ namespace
  }
  else if (rv == 0)
  {
  - cerr << "VTE did not respond to CAPTURE `CSI > Ps ; Ps ; Ps t`.\n";
  + cerr << "VTE did not respond to CAPTURE `CSI > Ps ; Ps t`.\n";
  return false;
  }
  