error() is not printing the value of the variable when assert expression only contains that variable

[vzakaznikov]

with Module("regression"):
    with Scenario("my test"):
        with Check("my check"):
            value = False
            result = snapshot(value,id="my_test",name="my_check")
            assert result, error()

produces the following output where the value of the result is not printed.

Jun 16,2023 8:03:36       ⟥  Check my check
                42ms       ⟥    Exception: Traceback (most recent call last):
                                    File "/home/user/Projects/Altinity/training/davit/using_snapshots/test.py", line 9, in <module>
                                      assert result, error()
                                  AssertionError: Oops! Assertion failed

                                  The following assertion was not satisfied
                                    assert result, error()

                                  Assertion values
                                    assert result, error()
                                    ^ is False

                                  Where
                                    File '/home/user/Projects/Altinity/training/davit/using_snapshots/test.py', line 9 in '<module>'

                                   1|  from testflows.core import *
                                   2|  from testflows.asserts import snapshot, values, error
                                   3|  
                                   4|  with Module("regression"):
                                   5|      with Scenario("my test"):
                                   6|          with Check("my check"):
                                   7|              value = False
                                   8|              result = snapshot(value,id="my_test",name="my_check")
                                   9|>             assert result, error()
                                  10|  
                                  11|

instead we want to see output similar to

                         Assertion values
                           assert result and True, error()
                                  ^ is SnapshotError(
                           filename=/home/user/Projects/Altinity/training/davit/using_snapshots/snapshots/test.py.my_test.snapshot
                           name=my_check
                           snapshot_value="""
                               True""",
                           actual_value="""
                               False""",
                           diff="""
                               --- /home/user/Projects/Altinity/training/davit/using_snapshots/snapshots/test.py.my_test.snapshot
                               +++ 
                               @@ -1 +1 @@
                               -True
                               +False
                           """)