Comment 10 for bug 1613199

If we want to include this bug in the paramiko fix Diana Clarke is working on, I'd suggest that we need to include the following:
* Unit test coverage that explicitly tests for the prepended text so the test breaks if we ever change this
* Documentation updates making it explicit that this is something we support and supported workflows for using it
* Validation and test coverage to ensure the prepended text doesn't cause failures (eg, what happens if someone prepends a unicode snowman)
* Potential security impacts of supporting prepended text (or a statement that there are none along with justification)

Given that I'm not clear what the use cases are for supporting this, I'm not sure it's worth the overhead and potential added complexity. That said, we could also not do the above things and just not officially support it, in which case this bug is still invalid.

If we are going to say this is a legit issue and recognize this as a regression, then we need to properly support this feature.