Port some formatting and documentation changes that were omitted in port 171 of float MR 1527

Not all changes from the original MR were ported, which makes porting following MRs more
difficult than it should be.

This commit ports some of the missing changes in preparation for work on port 391: #2102

Original float MR:
ivas-codec-pc/ivas-codec!1527

Incomplete port to ivas-float-update:
!1978