Update Changelog, Docs and Error Message

CHANGELOG.md

@@ -6,7 +6,8 @@
 ## [Unreleased]
 Changes since last non-beta release.
 
-- Added `append_stylesheet_pack_tag` helper, which is required for filesystem-based automated Component Registry API on React-on-Rails.
+### Added
+- `append_stylesheet_pack_tag` helper. It helps in configuring stylesheet pack names from the view for a route or partials. It is also required for filesystem-based automated Component Registry API on React on Rails gem. [PR 144](https://github.com/shakacode/shakapacker/pull/144) by [pulkitkkr](https://github.com/pulkitkkr).
 
 _Please add entries here for your pull requests that are not yet released._
 

README.md

@@ -284,8 +284,7 @@ Thus, you can distribute the logic of what packs are needed for any route. All t
 
 **Important:** `append_javascript_pack_tag` can be used anywhere in your application as long as it is executed BEFORE the `javascript_pack_tag`. If you attempt to call `append_javascript_pack_tag` helper after `javascript_pack_tag`, an error will be raised. You should have only a single `javascript_pack_tag` invocation in your page load.
 
-**Important** Similar to `append_javascript_pack_tag`, the `append_stylesheet_pack_tag` should be used anywhere in your application as long as it is executed BEFORE the `stylesheet_pack_tag`. However, if you attempt to call `append_stylesheet_pack_tag` helper after `stylesheet_pack_tag`, an error will be **NOT** be raised.
-
+**Important** Similar to `append_javascript_pack_tag`, the `append_stylesheet_pack_tag` should be used anywhere in your application as long as it is executed BEFORE the `stylesheet_pack_tag`. If you attempt to call `append_stylesheet_pack_tag` helper after `stylesheet_pack_tag`, an error will be raised. However, you may have multiple invocation of `stylesheet_pack_tag`                                                                                  
 The typical issue is that your layout might reference some partials that need to configure packs. A good way to solve this problem is to use `content_for` to ensure that the code to render your partial comes before the call to `javascript_pack_tag`.
 
 ```erb

lib/webpacker/helper.rb

@@ -169,7 +169,7 @@ def stylesheet_pack_tag(*names, **options)
   def append_stylesheet_pack_tag(*names)
     if @stylesheet_pack_tag_loaded
       raise "You can only call append_stylesheet_pack_tag before stylesheet_pack_tag helper. " \
-      "Please refer to https://github.com/shakacode/shakapacker/blob/master/README.md#usage for the usage guide"
+      "Please refer to the documentation for stylesheet_pack_tag for more information."
     end
 
     @stylesheet_pack_tag_queue ||= []
@@ -179,7 +179,7 @@ def append_stylesheet_pack_tag(*names)
   def append_javascript_pack_tag(*names, defer: true)
     if @javascript_pack_tag_loaded
       raise "You can only call append_javascript_pack_tag before javascript_pack_tag helper. " \
-      "Please refer to https://github.com/shakacode/shakapacker/blob/master/README.md#usage for the usage guide"
+      "PPlease refer to the documentation for javascript_pack_tag for more information."
     end
 
     hash_key = defer ? :deferred : :non_deferred