drush-ops/drush — pull request #259 by fluxsauce (2013-11-12 00:45:26+00:00)
Title: Suppress output of `which uname` check in pseudo terminal

When drush is executed in a pseudo terminal with no PATH defined, uname displays a message directly to standard output:

```
which: no uname in ((null))
```

The complaint from which is technically accurate, but there's no reason to show it to the user. There is no functional difference otherwise. This bug affects 6.x as well.