Fixed typo in profile-dump-html index and corrected overfull box issue in pdf
version of docs.
foreign.stex, system.stex
original commit: 3a3385c7d62326ba3d0d3220329dfcd3e3d0ac8e
Improve error reporting and improve docs as suggested by Andy, and
adjust `conv` -> `conv*` to fit a naming convention.
original commit: b34817aea5d3c4862e7bb313ee9f5281472a832f
Also, report an error if a string type is misused as an argument (for
foreign procedures) or result (for foreign callables) with
`__collect_safe`.
original commit: cdbfa3d86cb0719bf0979b3fe0aa5c4383282b77
