abe0731d2e
When `/etc/hosts` contained a FQDN with a trailing dot, the `\b` in the sed expression would not match, since dot is not considered to be a word character. Fix this by regexp-escaping the hostname search, and matching the end of the line on optional space followed by additional characters. Also add some tests that extract the regexp used by sed and verify that it does what we want. These will hopefully serve us in the future if we ever need to test additional edge cases.
Vagrant Core Plugins
These are plugins that ship with Vagrant. Vagrant core uses its own plugin system to power a lot of the core pieces that ship with Vagrant. Each plugin will have its own README which explains its specific role.