src/vs/workbench/contrib/terminal/browser/terminalEditor.ts/TerminalEditor/showFindWidget
class TerminalEditor:	showFindWidget() {
		const activeInstance = this._terminalEditorService.activeInstance;
		if (activeInstance && activeInstance.hasSelection() && activeInstance.selection!.indexOf('\n') === -1) {
			this._findWidget.show(activeInstance.selection);
		} else {
			this._findWidget.show();
		}
	}