2024 01 01 SVG stroke fix.
2023 06 01 Robust arrowheads and pgf text offsets.
2023 02 01 Distribution number change.
2023 01 12 Distribution fix and cleanup.
2022 12 01 More precise obtuse-angle arcs.
2022 02 02 Minor addition to the manual.
2021 11 01 Non-LaTeX error-handling cleanup.
2021 08 01 Line thickness recovery parameter enabled.
2021 05 15 Redundant code dating from pascal conversion removed.
2021 05 12 Robustness fixes.
2021 04 10 Improved robustness for fuzzed input.
2021 01 01 Added colored svg sprintf text and % appended to selected outputs.
2020 09 15 Shift operation bugfix.
2020 09 01 Improved error messaging; additional distribution examples.
2020 06 01 SVG text adjustments; GCC-10 conformance.
2020 03 01 Commas protected by brackets; zero-repetition "for" loop bugfix
           under bison.
2019 11 30 Fix of environment variable scope, arc attribute; improved error
           messages; generalized macro definition.
2019 08 30 Debug fixes.
2019 07 30 Corrected typos, copyright notices, version number, string treatment.
2019 07 20 Bugfix for buffer overflow with extreme arguments of wfloat().
2019 06 20 This is a major clone of the previous distribution, which
           contained compilable C code together with the original pascal
           source.  The pascal was translated to C code using p2c,
           which was included, and parsing was automated by a custom
           compiler-compiler which was also provided.  The current
           package includes C source only with parsing automated using
           GNU bison.  The original lexical analyser has been kept. To
           avoid introducing bugs, the C code has been changed only to
           accommodate bison; some p2c idiosyncrasies remain. The result
           is functionally identical to the previous version for correct
           input.

           A configure file (only needed for MinGW) added.