A full fix for the bug pointed out by @rrevi in #1070 where number categories caused errors during build.
new test case: numbers in categories
fix handling of number categories
adjust tests to new test post
Can you also make sure it doesn't contain the category 2013 (as a Fixnum?)
ensure number category is NOT included as fixnum
Looks awesome to me! @mattr-?
Update history to reflect merge of #1078