Index: branches/5.3.x/core/admin_templates/languages/email_template_edit.tpl
===================================================================
diff -u -N -r15677 -r15690
--- branches/5.3.x/core/admin_templates/languages/email_template_edit.tpl	(.../email_template_edit.tpl)	(revision 15677)
+++ branches/5.3.x/core/admin_templates/languages/email_template_edit.tpl	(.../email_template_edit.tpl)	(revision 15690)
@@ -69,7 +69,7 @@
 
 		<inp2:m_RenderElement name="subsection" prefix="email-template" fields="HtmlBody,PlainTextBody" title="la_section_Message"/>
 			<inp2:m_if check="m_IsDebugMode">
-				<inp2:m_RenderElement name="inp_edit_textarea_ml" prefix="email-template" field="HtmlBody" format="no_default" title="la_fld_HtmlVersion" allow_html="1" control_options="{min_height: 200}"/>
+				<inp2:m_RenderElement name="inp_edit_codemirror" prefix="email-template" field="HtmlBody" format="no_default" title="la_fld_HtmlVersion" language="text/html" allow_html="1" control_options="{min_height: 200}"/>
 			<inp2:m_else/>
 				<inp2:m_RenderElement name="inp_edit_fck" prefix="email-template" field="HtmlBody" format="no_default" title="la_fld_HtmlVersion" rows="5" cols="60" control_options="{min_height: 200}"/>
 			</inp2:m_if>