2. Commit test cases used to debug ALGOLXEM under new "tests" directory.
3. Commit new CODEDUMP55.alg_m utility to prepare a semi-formatted dump of a B5500 code file.
4. Commit further typographical corrections to B5500 Algol compiler source uncovered during conversion and debugging of ALGOLXEM.
* Replace reserved words used as identifiers with alternates
* Fix up remaining Algol special characters in text (left-arrow, etc.)
* Reverse bit numbering in partial word designators and bit concatenates
* Complete establishment of string codes (6"...", 3"...")
* Miscellaneous formatting and proof-reading corrections.
Also commit additional proof-reading corrections to ALGOL.alg_m.