Spelling and Grammar check [ci skip]

actionpack/test/dispatch/url_generation_test.rb

@@ -66,7 +66,7 @@ module TestUrlGeneration
       assert_equal "http://www.example.com:8080/foo", foo_url(host: "www.example.com:8080", protocol: "http://")
     end
 
-    test "port option overides the host" do
+    test "port option overrides the host" do
       assert_equal "http://www.example.com:8080/foo", foo_url(host: "www.example.com:8443", protocol: "http://", port: 8080)
     end
 

activerecord/lib/active_record/relation/query_methods.rb

@@ -427,7 +427,7 @@ module ActiveRecord
     # === string
     #
     # A single string, without additional arguments, is passed to the query
-    # constructor as a SQL fragment, and used in the where clause of the query.
+    # constructor as an SQL fragment, and used in the where clause of the query.
     #
     #    Client.where("orders_count = '2'")
     #    # SELECT * from clients where orders_count = '2';
@@ -656,7 +656,7 @@ module ActiveRecord
     #     when 'Reviewer'
     #       Post.published
     #     when 'Bad User'
-    #       Post.none # => returning [] instead breaks the previous code
+    #       Post.none # It can't be chained if [] is returned.
     #     end
     #   end
     #

activesupport/lib/active_support/core_ext/module/attribute_accessors.rb

@@ -49,7 +49,7 @@ class Module
   #     include HairColors
   #   end
   #
-  #   Person.hair_colors # => [:brown, :black, :blonde, :red] +  #
+  #   Person.hair_colors # => [:brown, :black, :blonde, :red]
   def mattr_reader(*syms)
     options = syms.extract_options!
     syms.each do |sym|
@@ -181,7 +181,7 @@ class Module
   # Or pass <tt>instance_accessor: false</tt>, to opt out both instance methods.
   #
   #   module HairColors
-  #     mattr_accessor :hair_colors, instance_acessor: false
+  #     mattr_accessor :hair_colors, instance_accessor: false
   #   end
   #
   #   class Person

guides/source/generators.md

@@ -560,7 +560,7 @@ This method also takes a block:
 
 ```ruby
 vendor "seeds.rb" do
-  "puts 'in ur app, seeding ur database'"
+  "puts 'in your app, seeding your database'"
 end
 ```