Revert "Renamed 'lv' to 'lval' to distinguish it from lifetimes. Renamed 'rv' to 'rval' to match 'lval'. Added hypentation in names like 'lvaldeinit' for readability."

This reverts commit 10b4e1d62b15e93bbf6fea14f92895ba6731b5ba.
Merge branch 'master' into typeless