Specs cleanup

spec/ameba/rule/lint/duplicated_require_spec.cr

@@ -24,12 +24,12 @@ module Ameba::Rule::Lint
     end
 
     it "reports rule, pos and message" do
-      source = Source.new %(
+      source = Source.new <<-CRYSTAL, "source.cr"
         require "./thing"
         require "./thing"
         require "./another_thing"
         require "./another_thing"
-      ), "source.cr"
+        CRYSTAL
 
       subject.catch(source).should_not be_valid
 

spec/ameba/rule/lint/empty_expression_spec.cr

@@ -13,7 +13,7 @@ module Ameba
 
   describe Rule::Lint::EmptyExpression do
     it "passes if there is no empty expression" do
-      s = Source.new %(
+      s = Source.new <<-CRYSTAL
         def method()
         end
 
@@ -30,7 +30,7 @@ module Ameba
 
         begin "" end
         [nil] << nil
-      )
+        CRYSTAL
       subject.catch(s).should be_valid
     end