Implement hook_help().

+++ b/album_hierarchy.module
@@ -1,4 +1,22 @@
+      return '<p>' . t('For showing albums in a hierarchy of years and months of

Instead of returning direct data assign it to variable.

$output = '

' . t('For showing albums in a hierarchy of years and months of
+ uploaded date of image, Album Hierarchy creates an album page having list
+ of years album and on clicking to every year album, month album comes and
+ next is list of images with an option to like & write comments with list
+ of comments on image slider.') . '

';

return $output;

Looking fine to me.

Thank you guys for your help.