oruen/cramp — comment on commit 57cbb7645192a24d181a7a3b9e486e73647003a2
File:  line 0
By wtn:

Are you using this with activesupport from rails master (`4.0.0.beta`)?

If so, `[‘>= 3.1’, ‘< 5.0’]` is loose enough. Otherwise, `'~> 3.1'` is equivalent to `[‘>= 3.1’, ‘< 4.0’]` and is pedantically most appropriate.