Warnings in sphinx generated manpage

The manpage for hdfcompass produced by:

```
sphinx-build -N -b man docs build/man
```

has formatting warnings according to the Debian linting tool.

It uses the output of the following command:

```
MANROFFSEQ='' MANWIDTH=80 man --warnings -E UTF-8 -l -Tutf8 -Z ./build/man/hdfcompass.1 >/dev/null
:113: warning [p 2, 2.0i]: cannot adjust line
:120: warning [p 2, 3.7i]: can't break line
:148: warning [p 2, 8.0i]: can't break line
:161: warning [p 2, 10.3i]: cannot adjust line
```

which lists 4 warnings.

I understand that the content of the documentation is still work-in-progress, so fixing this issue may be considered low-priority.