More precision in reporting line numbers

[simonharris]

ERROR: /Users/simon/project_git/safecracker.pl/parser/tests/test_parser.pl:26:
ERROR: test parser:clue_01: received error: code_type/2: Type error: character' expected, found less' (an atom)

It's all true. But 26 is just the line with the head of the test/1 predicate in it. Can we add:

• the line of the actual assert_* call that didn't pass
• where in the code the Type error occurred
• any further detail from deeper into the call stack
• ...?