Fixed Open url confirm screen not showing URL.

src/main/java/net/minecraftforge/fml/client/GuiModList.java

@@ -425,7 +425,7 @@ public class GuiModList extends GuiScreen
             lines.add(WHITE + "Version: " + selectedMod.getVersion());
             lines.add(WHITE + "Mod State: " + Loader.instance().getModState(selectedMod));
             if (vercheck.status == Status.OUTDATED || vercheck.status == Status.BETA_OUTDATED)
-                lines.add("Update Avalible: " + (vercheck.url == null ? "" : vercheck.url));
+                lines.add("Update Available: " + (vercheck.url == null ? "" : vercheck.url));
 
             lines.add(null);
             lines.add(RED + "No mod information found");

src/main/java/net/minecraftforge/fml/common/Mod.java

@@ -202,6 +202,7 @@ public @interface Mod
     /**
      * An optional URL to a JSON file that will be checked once per launch to determine if there is an updated
      * version of this mod and notify the end user. For more information see ForgeVersion.
+     * Format is defined here: https://gist.github.com/LexManos/7aacb9aa991330523884
      * @return URL to update metadata json
      */
     String updateJSON() default "";