Fix spelling in API docs

[ci skip]

Author: djpowers

actionview/lib/action_view/helpers/cache_helper.rb

@@ -88,7 +88,7 @@ module CacheHelper
       #
       # === Explicit dependencies
       #
-      # Some times you'll have template dependencies that can't be derived at all. This is typically
+      # Sometimes you'll have template dependencies that can't be derived at all. This is typically
       # the case when you have template rendering that happens in helpers. Here's an example:
       #
       #   <%= render_sortable_todolists @project.todolists %>

activerecord/lib/active_record/fixtures.rb

@@ -88,7 +88,7 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError #:nodoc:
   #     assert_equal "Ruby on Rails", @rubyonrails.name
   #   end
   #
-  # In order to use these methods to access fixtured data within your testcases, you must specify one of the
+  # In order to use these methods to access fixtured data within your test cases, you must specify one of the
   # following in your ActiveSupport::TestCase-derived class:
   #
   # - to fully enable instantiated fixtures (enable alternate methods #1 and #2 above)
@@ -103,7 +103,7 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError #:nodoc:
   #
   # = Dynamic fixtures with ERB
   #
-  # Some times you don't care about the content of the fixtures as much as you care about the volume.
+  # Sometimes you don't care about the content of the fixtures as much as you care about the volume.
   # In these cases, you can mix ERB in with your YAML fixtures to create a bunch of fixtures for load
   # testing, like:
   #