Double click should highlight a whole word, and triple click should highlight a whole line. This mostly works.
I get a failure when I try to double-click two words from different lines, one after the other. The first double-click works (a word is highlighted). The first click on the next word (click #3), on a different line, somehow is registered as a triple-click, instead of the first click of another double-click. The entire second line is selected. When I finish the second double-click (click #4), the word is selected correctly. Most of the time.
The problem is worse when I hold down ctrl to highlight both the first word and the second word... in this case, I end up selected the first word and the entire next line.
Hope it's clear?