double click select in the repl should match the editor rules

[ethanbsmith]

double clicking on a numeric literal that contains a decimal point only selects half the digits on one side of the literal. same goes for exponent based literal numbers and variable names with a "." in them. it would be really nice if the repl used all of the same rules double click text selection as the main editor. This would be very nice for heavy interactive sessions where there is a lot of prototyping and examination of output