doc/guix.texi (Setting Up the Daemon): Remove comma and extra words.
doc/guix.texi (Mail Services): Add definite article to setting. Use
@samp markup on setting.
Signed-off-by: Florian Pelz <pelzflorian@pelzflorian.de>
Change-Id: I5b3ef115ec718454db4fc046ea5f77ba9fe50a37