mdoc fixes

contrib/libxo/libxo/xo_create.3

@@ -76,7 +76,7 @@ https://github.com/Juniper/libxo/releases
 .Sh SEE ALSO
 .Xr xo_emit 3
 and
-.Xf xo_set_options 3 .
+.Xr xo_set_options 3 .
 .Sh HISTORY
 The
 .Fa libxo

contrib/libxo/libxo/xo_emit.3

@@ -35,7 +35,7 @@ but using a more complex format description string, as described in
 .Pp
 .Fn xo_emit
 uses the default output handle, as described in
-.Xf libxo 3 ,
+.Xr libxo 3 ,
 where
 .Fn xo_emit_h
 uses an explicit handle.

contrib/libxo/libxo/xo_open_container.3

@@ -105,7 +105,7 @@ container, a warning will be generated.
         <div class="data"
              data-tag="host-name">my-host.example.org</div>
 .Ed
-.SH EMITTING HIERARCHY
+.Sh EMITTING HIERARCHY
 To create a container, use the
 .Fn xo_open_container
 and
@@ -131,7 +131,7 @@ traditional C strings can be used directly.
 The close functions with the
 .Dq _d
 suffix are used in
-.Dq Do The Right Thing
+.Dq The Right Thing
 mode, where the name of the open containers, lists, and
 instances are maintained internally by
 .Em libxo
@@ -161,7 +161,7 @@ Some user may find tracking the names of open containers, lists, and
 instances inconvenient.
 .Em libxo
 offers
-.Dq Do The Right Thing
+.Dq The Right Thing
 mode, where
 .Em libxo
 will track the names of open containers, lists, and instances so