add an assertion that catches the infinite loop
let h_hashtable_merge's combine function decide what to do on NULL dst values
make sure h_string_update copies its subtrees
temp commit some debugging stuff for posterity
comment wording
justify a const cast
upgrade dummy example to require LL(3)
remove debug output from fill_table_row
No more cycles in table generation! (Merge branch 'LL' of https://github.com/pesco/hammer)
Refactored all of the desugaring code to no longer depend on memory being initialized to 0. Everything is about 12% faster now.
Merge branch 'master' of https://github.com/thequux/hammer

Conflicts:
	src/backends/llk.c
remove useless desugar_unimplemented; revert incorrect changes to test_llk()