wayneeseguin/rvm — pull request #1322 by e2 (2012-11-22 00:30:14+00:00)
Title: use Zsh "whence" to avoid matching functions

```
__rvm_where rvm
```

matches 'rvm()' function, causing a flood of eval() parse errors (during ruby install).

The patch: use "whence -p" when available (Zsh).