Unix Concepts: Use <th> for table headers.

This way they are styled according to the values in the css file.

diff --git a/Unix_Concepts.m4 b/Unix_Concepts.m4
index 938befcd3590d3a3cb421f79b4dc566addb44f53..321bdda7ce2f7f65e8b1a11f6003a0db393f7430 100644 (file)
--- a/Unix_Concepts.m4
+++ b/Unix_Concepts.m4
@@ -796,11 +796,11 @@ as described below. </p>
 
 <table>
        <tr>
-               <td> </td>
-               <td> <em>Directories</em> </td>
-               <td> <em>Non-directories</em> </td>
+               <th> &nbsp;&nbsp; </th>
+               <th> Directories </th>
+               <th> Non-directories </th>
        </tr> <tr>
-               <td> <code>&nbsp;r&nbsp;</code> </td>
+               <th> <code>r</code> </th>
 
                <td> The permission to list the directory contents. More precisely,
                this bit grants the permission to call <code>opendir(3)</code>
@@ -813,7 +813,7 @@ as described below. </p>
                fail for other reasons, though.
 
        </tr> <tr>
-               <td> <code>&nbsp;w&nbsp;</code> </td>
+               <th> <code>w</code> </th>
 
                <td> The permission to add or remove directory entries. That is,
                to create new files or to remove existing files. Note that write
@@ -827,7 +827,7 @@ as described below. </p>
                permissions. </td>
 
        </tr> <tr>
-               <td> <code>&nbsp;x&nbsp;</code> </td>
+               <th> <code>x</code> </th>
 
                <td> The permission to <em>search</em> the directory. Searching
                a directory means to access its entries, either by retrieving
@@ -858,9 +858,9 @@ three digits. </p>
 
 <table>
        <tr>
-               <td> octal value </td>
-               <td> symbolic representation </td>
-               <td> meaning </td>
+               <th> Octal Value </th>
+               <th> Symbolic Representation </th>
+               <th> Meaning </th>
        </tr> <tr>
                <td> 0 </td>
                <td> <code>---</code> </td>