Minor change in guidelines

Change in one case txzchk to txzchk(1).

next/guidelines.html

@@ -405,7 +405,9 @@ app from time to time to view IOCCC mastodon updates.</p>
 <!-- END: the next line ends content from: inc/guidelines.closed.hdr -->
 <!-- This is the last line modified by the tool: bin/gen-status.sh -->
 <h1 id="th-international-obfuscated-c-code-contest-official-guidelines">28th International Obfuscated C Code Contest Official Guidelines</h1>
-<p>Copyright © 2024 Leonid A. Broukhis and Landon Curt Noll.</p>
+<p class="leftbar">
+Copyright © 2024 Leonid A. Broukhis and Landon Curt Noll.
+</p>
 <p>All Rights Reserved. Permission for personal, education or non-profit use is
 granted provided this this copyright and notice are included in its entirety
 and remains unaltered. All other uses must receive prior permission in
@@ -426,7 +428,7 @@ previous IOCCC</strong>.
 </p>
 <p>Most lines (we sometimes make mistakes) that were modified since the previous
 IOCCC start with a solid 4 pixel black left border (or, in the case of a code
-block, just a vertical bar).</p>
+block or blockquote, just a vertical bar).</p>
 <div id="about_guidelines">
 <h1 id="about-this-file">ABOUT THIS FILE:</h1>
 </div>
@@ -1325,7 +1327,7 @@ Submitting source that uses the content of
 <a href="../authors.html#Anthony_C_Howe">Anthony C Howe</a>, might run the risk of
 violating <a href="rules.html#rule7">Rule 7</a>.</p>
 <p class="leftbar">
-The <code>txzchk</code> tool source is not an original work,
+The <code>txzchk(1)</code> tool source is not an original work,
 unless you are <a href="../authors.html#Cody_Boone_Ferguson">Cody Boone Ferguson</a>, in
 which case it is original! :-) Submitting source that uses the content of
 <a href="https://github.com/ioccc-src/mkiocccentry/blob/master/txzchk.c">txzchk.c</a>,