Simply the Makefile header.
Refer to the //www.ioccc.org/bugs.md URL (that will eventually exist).
Now using CC BY-SA 4.0 License to how you may share and adapt the
Makefile.
The commit 00ae59cd47 had a
mistake that introduces changes to Makefiles for 1996 thru 2020
that should not have been included.
This change reverses these intermediate changes until
the given year's Makefiles are ready.
In particular the following fixes were made:
-MKFIFo= mkfifo
+MKFIFO= mkfifo
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
If it's not immediately clear what the problem is the last letter of the
variable names were in lower case.
As per discussions on GitHub the index.html and hint.html files should
be deleted in favour of README.md files (from any
.text/.txt/.markdown/.md files which will be turned into README.md in an
upcoming commit).