Double-clicking \n selects the whole line. Separately, double-clicking after an opening delimiter (like ' or " or whatever) selects until the closing delimiter. If there is no closing delimiter, we currently don't select anything. Instead, if there is no closing delimiter, we should ignore delimiter-based selection and then check whether to select the whole line.
To reproduce:
Create a textbox containing only a single line of text which ends with '. Double-clicking after the ' should select the line. Currently it does not (because it instead looks forward for a closing ', finds none, and bails).
Double-clicking \n selects the whole line. Separately, double-clicking after an opening delimiter (like ' or " or whatever) selects until the closing delimiter. If there is no closing delimiter, we currently don't select anything. Instead, if there is no closing delimiter, we should ignore delimiter-based selection and then check whether to select the whole line.
To reproduce:
Create a textbox containing only a single line of text which ends with
'. Double-clicking after the'should select the line. Currently it does not (because it instead looks forward for a closing', finds none, and bails).