README.md: small tweaks

Signed-off-by: Sam James <sam@gentoo.org>

README.md

@@ -1,15 +1,15 @@
 ## getuto
 
-getuto ('Gentoo trust tool') is a tool to maintain a gpg keyring in `/etc/portage/gnupg`
+getuto (_Gentoo trust tool_) is a tool to maintain a gpg keyring in `/etc/portage/gnupg`
 for binary packages:
-* It creates a keyring in `/etc/portage/gnupg` if it doesn't already exist.
+* It creates a keyring in `/etc/portage/gnupg` if it doesn't already exist;
 * If a keyring already exists, it will refresh the keys from keyservers/wkd
   and import newer keys if available on the system.
 
-If `--getbinpkg` or `--getbinpkgonly` is used, Portage will run `getuto` before fetching
-any binary packages.
-
 A fresh keyring is needed to safely verify binary packages for revocations
 and renewals of gpg keys.
 
+If `--getbinpkg` or `--getbinpkgonly` is used, Portage will run `getuto` before fetching
+any binary packages. It is unused otherwise.
+
 To disable getuto, set `PORTAGE_TRUST_HELPER=true` in `/etc/portage/make.conf`.