Further fix for 57273.
diff --git a/platform/org.eclipse.platform/plugin.properties b/platform/org.eclipse.platform/plugin.properties
index 4f955c1..ec272fe 100644
--- a/platform/org.eclipse.platform/plugin.properties
+++ b/platform/org.eclipse.platform/plugin.properties
@@ -23,6 +23,6 @@
 activity.java=Java Development
 activity.java.desc=Grants the ability to develop Java applications.
 activity.plugin=Plug-in Development
-activity.plugin.desc=Grants the ability to develop plug-ins, fragments and features.
+activity.plugin.desc=Grants the ability to develop plug-ins, fragments, and features.
 activity.cat.java=Java
 activity.cat.plugin=Plug-in Development