Log Message:
lang/algol68g: update to version 3.1.0

Most pkgsrc patches were incorporated.

From the NEWS file:

Version 3.1.0, November 2022
* Fix several bugs reported for 3.0.0-8.
* Apply several OS dependent patches reported for 3.0.0-8.
* READ and INCLUDE relative to the source file, not the present working directory.
  This conforms to the C preprocessor standard.

Versions 3.0.1-8, January/September 2022
* Fix several bugs reported for 3.0.0-7.
* Apply several OS dependent patches reported for 3.0.0-7.
* Update a68g.exe to GSL 2.7.1 and R mathlib 4.1.2.