Update templates/HelpFiles/InstructorPGProblemEditor.html.ep

Co-authored-by: K. Andrew Parker <kparker@citytech.cuny.edu>

templates/HelpFiles/InstructorPGProblemEditor.html.ep

@@ -131,7 +131,7 @@
 
 	<dt><%= maketext('Clean Code') %></dt>
 	<dd>
-		<%= maketext('Reformat the code using perltidy or a conversion to PGM>. Using perltidy will change the code '
+		<%= maketext('Reformat the code using perltidy or a conversion to PGML>. Using perltidy will change the code '
 			. ' in the editor window, and save changes to the temporary file. In some cases (if the code contains '
 			. 'backslashes or double tildes) this can result in odd spacing in the code.   The convert to PGML '
 			. 'feature changes the code in text blocks in the code to use PGML features.  Generally the conversion of '