Hello,
You do not necessarily need to do anything.
Those particular messages are not things that actually require fixing. They are more just along the lines of comments, but are left in the summary so they are likely to be seen.
The 'trusting user to translate' message is because most of our examples are given in tcsh syntax, but the user login shell is bash. So the user might have to alter some of the syntax to be able to run the commands in bash.
The 'consider sourcing' message is because, particularly on macs, some terminal programs process .bashrc, and some process .bash_profile. For that and similar reasons, it can be helpful if they both do the same things (so all the commands could go in one, and the other could source the first).
For a better understanding of these points, it might be good to review the
Unix tutorial.
- rick