diff --git a/doc/apple2.sgml b/doc/apple2.sgml
index e933d49fb..5209c60af 100644
--- a/doc/apple2.sgml
+++ b/doc/apple2.sgml
@@ -159,7 +159,7 @@ you cannot do it, it just means that there's no help.
   to be linked with <tt/--start-addr $4000/ to reserve the first hires page
   if they are intended to run on an Apple&nbsp;&rsqb;&lsqb; (in contrast to
   an Apple&nbsp;//e).
-  
+
   Note that the Apple&nbsp;&rsqb;&lsqb; default mouse callbacks support text
   mode only.
 
@@ -176,11 +176,11 @@ you cannot do it, it just means that there's no help.
   that because of the peculiarities of the 6551 chip transmits are not
   interrupt driven, and the transceiver blocks if the receiver asserts
   flow control because of a full buffer.
-  
-  The driver defaults to slot 2. Call ser_ioctl(0, <slot>) prior to ser_open
-  in order to select a different slot. ser_ioctl succeeds for all Apple&nbsp;II
-  slots, but ser_open fails with SER_ERR_NO_DEVICE if there's no SSC firmware
-  found in the selected slot.
+
+  The driver defaults to slot 2. Call <tt/ser_ioctl(0, &lt;slot&gt;)/ prior to
+  <tt/ser_open/ in order to select a different slot. <tt/ser_ioctl/ succeeds
+  for all Apple&nbsp;II slots, but <tt/ser_open/ fails with
+  <tt/SER_ERR_NO_DEVICE/ if there's no SSC firmware found in the selected slot.
 
 </descrip><p>
 
diff --git a/doc/apple2enh.sgml b/doc/apple2enh.sgml
index 8d4bb4e96..a98a91e55 100644
--- a/doc/apple2enh.sgml
+++ b/doc/apple2enh.sgml
@@ -158,7 +158,7 @@ you cannot do it, it just means that there's no help.
   Driver for the AppleMouse&nbsp;II Card. Searches all Apple&nbsp;II slots
   for an AppleMouse&nbsp;II Card compatible firmware. The default bounding
   box is &lsqb;0..279,0..191&rsqb;.
-  
+
   Note that the enhanced&nbsp;Apple&nbsp;//e default mouse callbacks support
   text mode only.
 
@@ -176,10 +176,10 @@ you cannot do it, it just means that there's no help.
   interrupt driven, and the transceiver blocks if the receiver asserts
   flow control because of a full buffer.
 
-  The driver defaults to slot 2. Call ser_ioctl(0, <slot>) prior to ser_open
-  in order to select a different slot. ser_ioctl succeeds for all Apple&nbsp;II
-  slots, but ser_open fails with SER_ERR_NO_DEVICE if there's no SSC firmware
-  found in the selected slot.
+  The driver defaults to slot 2. Call <tt/ser_ioctl(0, &lt;slot&gt;)/ prior to
+  <tt/ser_open/ in order to select a different slot. <tt/ser_ioctl/ succeeds
+  for all Apple&nbsp;II slots, but <tt/ser_open/ fails with
+  <tt/SER_ERR_NO_DEVICE/ if there's no SSC firmware found in the selected slot.
 
 </descrip><p>