Luca Fascione

[test] Added a few improvements to runtest.py test runner

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## Description I made a few changes to `runtest.py` that should improve its usefulness. However I also changed its output a bit, and I would like to change it some...

## Description Touched up lexer and parser so that for each AST node created the start/end line and columns are recorded. A new object called SrcLoc has been introduced that...