Tweaks to Postgres.org documentation

postgres-docs.user.css

/* ==UserStyle==
@name           Postgres Docs
@namespace      hjdarnel
@version        1.0.0
@description    Tweaks to Postgres.org documentation
@author         hjdarnel
@downloadURL    https://gist.github.com/hjdarnel/812299c24edcff73f6329c8955bb6e37/raw/postgres-docs.user.css
@updateURL      https://gist.github.com/hjdarnel/812299c24edcff73f6329c8955bb6e37/raw/postgres-docs.user.css
==/UserStyle== */
@-moz-document regexp(".*postgresql.org/docs.*") {
    #pgContentWrap {
        max-width: 1000px
    }
}