Select whole variable names by default

I've noticed that when I try to select a variable name with underscores in it, by default on one alphanumeric section of the variable is selected, and then I have to use the drag bars to select the whole variable name.  It would be more logical to select the whole variable name by default.  The file type I saw this with was VHDL--I'm not sure if it happens with other languages or not.