Bug: Incrementing/decrementing long literals removes the 'L' after the number

[coreywoodfield]

I found this in scala but it affects java code as well. If I have the following code:

private long long1 = 1L;
private long long2 = 2L;

and I select it and use StringManipulation to increment or decrement, it will increment or decrement as desired, but it removes the L which forces the number to be interpreted as a long