- Mark up a tip.1 command with the command element instead of keycap [1]

- Mark up hosts with hostid element [2]
- Use replaceable element instead of putting the value between <
  and > [3]

PR:		docs/123425 [1], docs/123426 [2], docs/123427 [3]
Submitted by:	pgj

en_US.ISO8859-1/books/handbook/serialcomms/chapter.sgml

@@ -1865,7 +1865,7 @@ AT&amp;B2&amp;W</programlisting>
 	(e.g.<filename>/dev/cuad0</filename>) and
 	<replaceable>speed</replaceable> is the speed
 	(e.g.<literal>57600</literal>).  When you are done entering the AT
-	commands hit <keycap>~.</keycap> to exit.</para>
+	commands type <command>~.</command> to exit.</para>
     </sect2>
 
     <sect2>
@@ -1922,7 +1922,7 @@ tip57600|Dial any phone number at 57600 bps:\
       <title>I Access a Number of Hosts Through a Terminal Server</title>
 
       <para>Rather than waiting until you are connected and typing
-	<command>CONNECT &lt;host&gt;</command> each time, use tip's
+	<command>CONNECT <replaceable>host</replaceable></command> each time, use tip's
 	<literal>cm</literal> capability.  For example, these entries in
 	<filename>/etc/remote</filename>:</para>
 
@@ -1934,7 +1934,7 @@ deep13:Gizmonics Institute terminal server:\
         :dv=/dev/cuad2:br#38400:at=hayes:du:pa=none:pn=5551234:</programlisting>
 
       <para>will let you type <command>tip pain</command> or <command>tip
-	  muffin</command> to connect to the hosts pain or muffin, and
+	  muffin</command> to connect to the hosts <hostid>pain</hostid> or <hostid>muffin</hostid>, and
 	<command>tip deep13</command> to get to the terminal server.</para>
     </sect2>
 
@@ -2010,7 +2010,7 @@ big-university 5551114</programlisting>
 	specifying the following in your <filename>&#36;HOME/.tiprc</filename>
 	file:</para>
 
-      <programlisting>force=&lt;single-char&gt;</programlisting>
+      <programlisting>force=<replaceable>single-char</replaceable></programlisting>
     </sect2>
 
     <sect2>