src/vs/editor/common/viewModel.ts/ViewLineRenderingData/isBasicASCII
class ViewLineRenderingData:	public static isBasicASCII(lineContent: string, mightContainNonBasicASCII: boolean): boolean {
		if (mightContainNonBasicASCII) {
			return strings.isBasicASCII(lineContent);
		}
		return true;
	}