[wwwdocs] projects/h8300-abi.html -- replace <tt> by <code>

[wwwdocs] projects/h8300-abi.html -- replace <tt> by <code>

[Gerald Pfeifer]

...hence converting to proper HTML 5.

Committed.

Gerald

Index: projects/h8300-abi.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/projects/h8300-abi.html,v
retrieving revision 1.9
diff -u -r1.9 h8300-abi.html
--- projects/h8300-abi.html	1 Sep 2018 23:42:09 -0000	1.9
+++ projects/h8300-abi.html	2 Sep 2018 16:59:17 -0000
@@ -30,12 +30,12 @@
 
 <h2>Argument Passing</h2>
 
-<h3>With <tt>-mno-quickcall</tt></h3>
+<h3>With <code>-mno-quickcall</code></h3>
 
-<p>With <tt>-mno-quickcall</tt>, every argument is pushed onto the
+<p>With <code>-mno-quickcall</code>, every argument is pushed onto the
 stack.</p>
 
-<h3>Without <tt>-mno-quickcall</tt></h3>
+<h3>Without <code>-mno-quickcall</code></h3>
 
 <h4>Functions with Fixed-Length Arguments</h4>
 
@@ -126,15 +126,15 @@
 <h2>Frame Pointer</h2>
 
 <p>On H8/300, R6 is used as the frame pointer.  On H8/300H and H8S,
-ER6 is used as the frame pointer.  <tt>-fomit-frame-pointer</tt> can
-be used to eliminate the use of the frame pointer in favor of the
+ER6 is used as the frame pointer.  <code>-fomit-frame-pointer</code>
+can be used to eliminate the use of the frame pointer in favor of the
 stack pointer.</p>
 
 <h2>Bit-Field</h2>
 
 <p>The memory location containing a bit-field is filled from MSB to
-LSB.  In the following example, <tt>a</tt> will take bit 7, MSB.
-<tt>b</tt> will take bit 6 and bit 5.</p>
+LSB.  In the following example, <code>a</code> will take bit 7, MSB.
+<code>b</code> will take bit 6 and bit 5.</p>
 
 <pre>
 struct s {
@@ -145,7 +145,7 @@
 
 <h2>Structure Alignment</h2>
 
-<p>Unless <tt>__attribute__ ((packed))</tt> is attached to the
+<p>Unless <code>__attribute__ ((packed))</code> is attached to the
 declaration of a struct, each structure member is aligned to a
 multiple of 2 bytes on H8/300 and of 4 bytes on H8/300H and H8S.</p>