Tweaks to gapmacro.tex and etc/convert.pl #6885

Job	Run time
Test in OpenBSD	47s
Cross compiler for s390x	58s
testinstall - - ubuntu-latest	57s
testexpect testmockpkg testspecial test-compile testlibgap testkernel testworkspace - - ubuntu-latest	58s
teststandard - - ubuntu-latest	57s
testmanuals - - ubuntu-latest	56s
testpackages testinstall-loadall - - ubuntu-latest	59s
makemanuals testmakeinstall - CONFIGFLAGS="--prefix=/tmp/gapprefix" NO_COVERAGE=1 - ubuntu-latest	57s
testbuildsys testmockpkg testinstall - NO_COVERAGE=1 ABI=64 BUILDDIR=out-of-tree CONFIGFLAGS="--enable-valgrind" - ubuntu-latest	59s
testbugfix - CONFIGFLAGS="--enable-memory-checking" - ubuntu-latest	57s
testbuildsys testmockpkg testinstall - NO_COVERAGE=1 ABI=32 BUILDDIR=out-of-tree CONFIGFLAGS="" - ubuntu-22.04	46s
testinstall - HPCGAP=yes ABI=64 - ubuntu-latest	58s
testmockpkg testinstall - - windows-2022	47s
testmockpkg testinstall testworkspace - BOOTSTRAP_MINIMAL=yes - macos-latest	53s
testinstall - JULIA=yes CONFIGFLAGS="--enable-debug" - ubuntu-22.04	50s
Send Slack notification on status change	1s
	13m 40s

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