gh-68168: Improve the docs for format units starting with 'e'#19610

ZackerySpytz wants to merge 3 commits intopython:mainpython/cpython:mainfrom

ZackerySpytz:bpo-23980-format-units-e-docsZackerySpytz/cpython:bpo-23980-format-units-e-docsCopy head branch name to clipboard