Avoid backslash in literal strings, when possible

Author: bquorning

lib/rubocop/cop/rspec/be.rb

@@ -20,7 +20,7 @@ module RSpec
       #   expect(foo).to be(true)
       #
       class Be < Base
-        MSG = 'Don\'t use `be` without an argument.'
+        MSG = "Don't use `be` without an argument."
 
         def_node_matcher :be_without_args, <<-PATTERN
           (send _ #Runners.all $(send nil? :be))

spec/rubocop/cop/rspec/example_wording_spec.rb

@@ -44,7 +44,7 @@
     RUBY
   end
 
-  it 'finds description with `shouldn\'t` at the beginning' do
+  it "finds description with `shouldn't` at the beginning" do
     expect_offense(<<-RUBY)
       it "shouldn't do something" do
           ^^^^^^^^^^^^^^^^^^^^^^ Do not use should when describing your tests.
@@ -57,7 +57,7 @@
     RUBY
   end
 
-  it 'finds description with `SHOULDN\'T` at the beginning' do
+  it "finds description with `SHOULDN'T` at the beginning" do
     expect_offense(<<-RUBY)
       it "SHOULDN'T do something" do
           ^^^^^^^^^^^^^^^^^^^^^^ Do not use should when describing your tests.

spec/rubocop/rspec/example_spec.rb

@@ -24,7 +24,7 @@ def example(source)
   end
 
   it 'extracts interpolated doc string' do
-    expect(example("it(\"does \#{x}\")").doc_string)
+    expect(example('it("does #{x}")').doc_string)
       .to eq(s(:dstr, s(:str, 'does '), s(:begin, s(:send, nil, :x))))
   end