fixed a typo (flat -> flag)

diff --git a/docs/documentation/customize/concepts.html b/docs/documentation/customize/concepts.html
index ade9fc8b06605bd3d9c408b67092f5b3bf7ce787..0cc9ed41e22a3262d973c334ecbb2325d255081f 100644 (file)
--- a/docs/documentation/customize/concepts.html
+++ b/docs/documentation/customize/concepts.html
@@ -37,7 +37,7 @@ breadcrumb:
   </ul>
 
   <p>
-    Since these variables carry the <code>!default</code> flat, they can be assigned a <strong>new value</strong> either before or after having been imported.
+    Since these variables carry the <code>!default</code> flag, they can be assigned a <strong>new value</strong> either before or after having been imported.
   </p>
 </div>