Include binary op node to redundant return

spec/ameba/rule/style/redundant_return_spec.cr

@@ -104,6 +104,26 @@ module Ameba::Rule::Style
       end
     end
 
+    context "binary op" do
+      it "doesn't report if there is no return in the right binary op node" do
+        s = Source.new %(
+          def can_create?(a)
+            valid? && a > 0
+          end
+        )
+        subject.catch(s).should be_valid
+      end
+
+      it "reports if there is return in the right binary op node" do
+        s = Source.new %(
+          def can_create?(a)
+            valid? && return a > 0
+          end
+        )
+        subject.catch(s).should_not be_valid
+      end
+    end
+
     context "case" do
       it "reports if there are returns in whens" do
         s = Source.new %(

src/ameba/rule/style/redundant_return.cr

@@ -119,6 +119,7 @@ module Ameba::Rule::Style
       when Crystal::Expressions         then check_expressions node
       when Crystal::If, Crystal::Unless then check_condition node
       when Crystal::Case                then check_case node
+      when Crystal::BinaryOp            then check_binary_op node
       when Crystal::ExceptionHandler    then check_exception_handler node
       end
     end
@@ -146,6 +147,10 @@ module Ameba::Rule::Style
       check_node(node.else)
     end
 
+    private def check_binary_op(node)
+      check_node(node.right)
+    end
+
     private def check_exception_handler(node)
       check_node node.body
       check_node node.else