Define ARY_MAX_SIZE strictly. Use mrb_int instead of int.

Clean up range.c. Use mrb_int. Use mrb_vtype.

Remove unused var len

mrb_open takes no arguments: (void) instead of ()

cleanup: delete commented out match_op() from parse.y

Adjust some indents

cleanup: unused variable local_svar

Remove trailing whitespaces. This is just a cosmetic change.

bugfix: assert_raise

Remove unused var sv

Fix two typos

format some source code (vm.c)

Should be MRB_DATA class. RStruct isn't managed by mruby core. So it should be self-managed class instances.

Remove unused struct and more

format some source code (class.c)