message: replace ? with . in log message.
diff: @@ -495,7 +495,7 @@ export class ProjectOutlineProvider implements vscode.TreeDataProvider<BaseNode>
  updateCodeModel(folder: vscode.WorkspaceFolder, model: codemodel_api.CodeModelContent|null, ctx: ExternalUpdateContext) {
  let existing = this._folders.get(folder.uri.fsPath);
  if (!existing) {
  - rollbar.error(localize('error.update.code.model.on.nonexist.folder', 'Updating code model on folder that does not yet exist?'));
  + rollbar.error(localize('error.update.code.model.on.nonexist.folder', 'Updating code model on folder that does not yet exist.'));
  // That's an error, but we can keep going otherwise.
  existing = new WorkspaceFolderNode(folder);
  this._folders.set(folder.uri.fsPath, existing);
  