Fix mirroring in RemoteRunner.send()
Fix mirroring in RemoteRunner.send()

Data read from stdin is already text (not bytes), so it doesn't need to
be decoded before mirroring to stdout (and attempting to do so will
cause an error).

Removed `encoding` arg since it's no longer used and renamed local
`data` to `text` for clarity.

wylee/runcommands,wylee/runcommands