[ci skip] Minor documentation fixes for consistency

actionview/test/ujs/public/vendor/jquery-2.2.0.js

@@ -9639,7 +9639,7 @@ jQuery.fn.extend( {
 	// 2) For the hidden or detached element
 	// 3) For body or html element, i.e. in case of the html node - it will return itself
 	//
-	// but those exceptions were never presented as a real life use-cases
+	// but those exceptions were never presented as a real life use cases
 	// and might be considered as more preferable results.
 	//
 	// This logic, however, is not guaranteed and can change at any point in the future

guides/source/autoloading_and_reloading_constants.md

@@ -798,7 +798,7 @@ to load a file using the current [loading mechanism](#loading-mechanism), and
 keeping track of constants defined in that file as if they were autoloaded to
 have them reloaded as needed.
 
-`require_dependency` is rarely needed, but see a couple of use-cases in
+`require_dependency` is rarely needed, but see a couple of use cases in
 [Autoloading and STI](#autoloading-and-sti) and [When Constants aren't
 Triggered](#when-constants-aren-t-missed).
 

guides/source/testing.md

@@ -1012,7 +1012,7 @@ Finally we can assert that our response was successful and our new article is re
 
 #### Taking it further
 
-We were able to successfully test a very small workflow for visiting our blog and creating a new article. If we wanted to take this further we could add tests for commenting, removing articles, or editing comments. Integration tests are a great place to experiment with all kinds of use-cases for our applications.
+We were able to successfully test a very small workflow for visiting our blog and creating a new article. If we wanted to take this further we could add tests for commenting, removing articles, or editing comments. Integration tests are a great place to experiment with all kinds of use cases for our applications.
 
 
 Functional Tests for Your Controllers

railties/test/application/test_test.rb

@@ -234,7 +234,7 @@ module ApplicationTests
 
     # TODO: would be nice if we could detect the schema change automatically.
     # For now, the user has to synchronize the schema manually.
-    # This test-case serves as a reminder for this use-case.
+    # This test case serves as a reminder for this use case.
     test "manually synchronize test schema after rollback" do
       output  = rails("generate", "model", "user", "name:string")
       version = output.match(/(\d+)_create_users\.rb/)[1]