err... sorry? https://www.debuggex.com/r/EpocMU_7Fq_B_p9z https://www.debuggex.com/r/EpocMU_7Fq_B_p9z edit: wait, I thought about it for a second and I see w

err... sorry? https://www.debuggex.com/r/EpocMU_7Fq_B_p9z https://www.debuggex.com/r/EpocMU_7Fq_B_p9z edit: wait, I thought about it for a second and I see what you meant. You're not saying it's wrong, you're saying it's obvious. I wasn't sure if it was obvious because I wasn't sure if {1,3} was supposed to be {1-3} and there was a mistake in the expression, or if there was some kind of unexpected error in the [a-z0-9%] expression. Because even in this simple example, there is room for error.