goto_env: Optional single-cmd mode
Rename goto_env to with_env, consistent with git-with
with_env: Clear new behaviour that is problematic
fix bugs in with_env script
Replace 4-space indents with tabs

Probably snuck in when merging with hadron.
bashrc: set ALERTS (instead of append)

Because I was having problems with bad state after checking out the wrong branch.
gitconfig: Remove --topo-order from git lg as it is implied by --graph