Benjamin Cosman

combineSrcSpans has a hidden assumption

4

combineSrcSpans treats its first argument as the 'start' and second as the 'end', leading to strange behavior like combining (1,1-2) and (1,1) to get (1,1): ``` >>> x = SpanCoLinear...

Doc 'Eq' instance fails Substitutivity

1

Consider the following code: ```haskell module Main (main) where import Prelude hiding (()) import Text.PrettyPrint main :: IO () main = do let s1 = text "if:" $+$ nest 4...

Blank submitted answer is confusing for pl-file-editor

4

As shown above, when you click Save on a pl-file-editor element, the "Submitted answer" at the bottom of the page is blank. I know from a handful of emails and...

There should be no penalty for re-submitting a wrong answer

6

Currently, if you choose a wrong answer on a multiple choice question and then accidentally hit "Save & Grade" _twice_, it counts as two wrong answers (using up tries /...