Language cleanup for clarity.
Fixing 'Note' formatting where typos have missing sections or broken formatting.
Fixes #4958 Truncate printed stdout if it contains non-printable characters
Ensure sys.stdout has an istty method
Merge pull request #5567 from risaacson/doc_corrections

A few documentation corrections
Add an "accept_hostkey" parameter to the git module to help automatically
accept hostkeys for git repos and prevent task hangs when the key is unknown
Set accept_hostkey to False by default in the git module and fail
early if the key is unknown
Do not fetch or add keys for http based git urls