Allow example descriptions to start with `[`
Allow example descriptions to start with `[`

This may happen when the first word starts with the letter that identifies the option.
C.f. https://github.com/tldr-pages/tldr/pull/1030 and https://github.com/tldr-pages/tldr/pull/1018
tldr-pages/tldr-lint,tldr-pages/tldr-lint