Fix line ending when reporting manifests via bash

[eddymoulton]

Background

While adding docs I discovered that we have a bug in our implementation for reporting manifests from bash scripts.

Due to the way we process the manifest string in the bash helper, we end up with a \n that isn't recognised as a newline in Server.

Results

Uses the newline character instead of the string of characters.

Before

Bash script step silently errors and does not report

After

Bash script step is reported now