Fix typos and add https on solidus.io

Author: lsizani

core/app/models/spree/order_merger.rb

@@ -67,7 +67,7 @@ def merge!(other_order, user = nil)
 
     private
 
-    # Retreive a matching line item from the existing order
+    # Retrieve a matching line item from the existing order
     #
     # It will compare line items based on variants, and all line item
     # comparison hooks on the order.

sample/lib/spree/sample.rb

@@ -7,7 +7,7 @@ module Spree
   module Sample
     class << self
       def load_sample(file, shell: Thor::Base.shell.new)
-        # If file is exists within application it takes precendence.
+        # If file is exists within application it takes precedence.
         if File.exist?(File.join(Rails.root, 'db', 'samples', "#{file}.rb"))
           path = File.expand_path(File.join(Rails.root, 'db', 'samples', "#{file}.rb"))
         else

sample/solidus_sample.gemspec

@@ -11,7 +11,7 @@ Gem::Specification.new do |s|
 
   s.author      = 'Solidus Team'
   s.email       = 'contact@solidus.io'
-  s.homepage    = 'http://solidus.io'
+  s.homepage    = 'https://solidus.io'
   s.license     = 'BSD-3-Clause'
 
   s.metadata['rubygems_mfa_required'] = 'true'