GitHub's markdown renderer does not wrap single line breaks,
so the message the bot leaves when closing a thread
would have an awkward line break.
This commit re-wraps the message to avoid that.
The shields.io badge for displaying a count of contributors
has two variants: `contributors` and `contributors-anon`,
as shown in https://shields.io/category/activity.
Apparently the former only counts contributions (i.e. commits)
whose author emails can be mapped to GitHub users.
Other contributions are considered "anonymous" by GitHub.
They are usually the result of either a misconfigured git installation,
emails that haven't been added to the user's GitHub profile,
or accounts that have been deleted or that changed their email address.
Since the project has always existed on GitHub from its inception,
the anonymous count is closer to the real number,
since all contributions would have come from GitHub pull requests,
which require a GitHub account to create.
There may be a slight overestimation in the contributors-anon count,
e.g. from people who authored commits with different author emails;
but that is nevertheless a closer estimate than the non-anon count,
and besides, it matches what GitHub shows on their own interface.
See more details at <https://github.com/badges/shields/issues/5969>
Before this patch the document suggested that the `f` allows the user to list some files to extract or insert to the archive.
This patch fixes that: the `f` allows an archive file to be specified. Without it the archive would be read from or written to stdout.
The verb 'output' doesn't correctly translate to the Dutch verb 'uitvoeren'.
Uitvoeren means to execute something, which isn't what 'yes' does.
To avoid confusion about whether or not 'yes' prints the message to an actual
printer, or just the console, the description has also been altered slightly.
