Update how-to-docs.html

Co-authored-by: Casey Carter <[email protected]>

Author: jwakely

how-to-docs.html

@@ -13,7 +13,7 @@
 
 <h1>How To Instructions</h1>
 <p>These instructions assume you keep the issues lists source files in a directory named <code>issues</code>.
-The issues are stored in XML files, one file per issue.
+Each issue is stored in an XML file.
 The software in the <code>src</code> directory builds programs
 that read the XML files and generates the HTML issues lists.
 When changes to the XML files are pushed to the GitHub repository an automated