cleans up some file vs path naming. file -> current-source-file file -> current-test-file somewhere else source-file -> path>source-file source-file-tuple -> source-file  | 
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|---|---|---|
| .. | ||
| test | ||
| authors.txt | ||
| crossref-docs.factor | ||
| crossref-tests.factor | ||
| crossref.factor | ||
| summary.txt | ||
| tags.txt | ||