TEST: hide must_warn from tracebacks

Author: gdementen

larray/tests/common.py

@@ -150,6 +150,9 @@ def meta():
 
 @contextmanager
 def must_warn(warn_cls=None, msg=None, match=None, check_file=True, num_expected=1):
+    # makes this function not appear in pytest tracebacks
+    __tracebackhide__ = True
+
     if num_expected == 0:
         yield []
     else: