fix typo
error-handling: Add note that ebuild-helpers die in EAPI>=4

Fixes bug #459296
Merge pull request #1 from nikai3d/patch-1

fix typo
contributing: Add github url for pull requests
contributing: Replace references to g.o.g.o with those on github
Fix for incorrect hyperlink to metastructure project, see https://bugs.gentoo.org/show_bug.cgi?id=455132
Merge pull request #2 from gentoo/metastructure_hyperlink_fix

Fix for incorrect hyperlink to metastructure project
slotting: Add sub-slots carefully to avoid useless rebuilds

Fixes bug #458838
Revert "contributing: Replace references to g.o.g.o with those on github"

This reverts commit 126c0cea4ee8e93b3385811d56d509deb942529a.