fix HTML problems associated with leading ---'s

Please do not use "**---**" in markdown lines to separate sections.

This causes `pandoc(1)` to generate "**\<hr />**".

The "**\<hr />**" has no effect in standard HTML 5 and interacts
badly with unquoted attribute values.

If a horizontal line is really needed, use "**\<hr>**".

If a short line is needed, use: "**\<hr
style="width:10%;text-align:left;margin-left:0">**"

2000/jarijyrki/README.md

@@ -293,7 +293,7 @@ Division by zero results in an IEEE Inf number.
 This section explains the meaning and rationale for the
 compile time parameters:
 
----
+<hr style="width:10%;text-align:left;margin-left:0">
 
 ```
     -DC=XK_Up

2000/jarijyrki/index.html

@@ -312,7 +312,7 @@ value supposedly returned by it.</p>
 <h4 id="compilation-parameters-and-configuration">2.9. Compilation Parameters and Configuration</h4>
 <p>This section explains the meaning and rationale for the
 compile time parameters:</p>
-<hr />
+<hr style="width:10%;text-align:left;margin-left:0">
 <pre><code>    -DC=XK_Up
     -DL=XK_Down
     -DO=XK_Left