Improve error message for math namespace collision #4579
Description
The following snippet will throw with
from snekmate.utils import math
import mathvyper.exceptions.NamespaceCollision: 'math' has already been declared as a ModuleInfo(module_t=venv/Lib/site-packages/snekmate/utils/math.vy, alias='math', ownership=<ModuleOwnership.NO_OWNERSHIP: 'no_ownership'>, ownership_decl=None)
contract "test.vy:2", line 2:0
1 from snekmate.utils import math
---> 2 import math
-------^
3You must run it via
vyper test.vy --enable-decimals.