message: Measure UTF16 string length, not codepoints, when setting a terminal line in TerminalCanvasEditSession
diff: @@ -69,7 +69,7 @@ export class TerminalCanvasEditSession extends EditSession {
  },
  end: {
  row,
  - column: existingLine != null ? existingLine.width : 0
  + column: existingLine != null ? existingLine.getString(0, 0).length : 0
  }
  };
  