Conventional formatting and some fixes for man page

[Mudskipper875]

Changes

• Use .OP macro in the SYNOPSIS section which will handle the font as well as the page width.

• Use macros like .B, .I and .BR instead of inline escapes.

• Use .TP instead of .PP in the OPTIONS section, which will handle the indentation and the first line-break.

• Change orientation of the table to maintain page width.

• Added missing newline in the table formatting for the "excercises" mode.

• Add COPYRIGHT section with licesne.

[budRich]

Hello @Mudskipper875 Thanks for the PR! I think your version of the manpage is much better than the autogenerated ones.

however, the manpages for all my projects are autogenerated from markdown documents by go-md2man or lowdown. And the content of the manpages are shared with other parts of the project (README.md, output of --help, wiki).

I am actually currently in the process of updating my homebrewed buildystem (budlabs/bashbud) and all my projects that uses it. And since the manpage is autogenerated, they will no longer be included in the repositories (instead generated with other documents via make).

So, I will merge this, but. I will also soon update this repo, where no manpage is included, and sadly, the generated one will be as bad as the one you have fixed.

[Mudskipper875]

Oh I see. Thanks anyway!