--first doesn't match from very beginning

[fullmetalScience]

--first --pattern 44xmr also produces other addresses like ones starting with 444xmr..

To reproduce: while ! monero-vanity --first --pattern 44x | grep -A99 -B99 ' 444x' ; do clear; done

This is a very minor issue that's easily worked around by adding ^ to the pattern, but may be worth fixing at least in the docs.