Ignore warnings about argument prefix with operator symbol.

test/-ext-/iter/test_yield_block.rb

@@ -16,7 +16,7 @@ class TestIter::YieldBlock < Test::Unit::TestCase
       block.call {}
     end
     def call_lambda(&block)
-      block.call &->{}
+      block.call(&->{})
     end
   end
 

test/ruby/test_lazy_enumerator.rb

@@ -17,9 +17,9 @@ class TestLazyEnumerator < Test::Unit::TestCase
       @enum.each do |v|
         @current = v
         if v.is_a? Enumerable
-          yield *v
+          yield(*v)
         else
-          yield v
+          yield(v)
         end
       end
     end

test/ruby/test_refinement.rb

@@ -2096,7 +2096,7 @@ class TestRefinement < Test::Unit::TestCase
         end
       }
       def call
-        ToProc.call &self
+        ToProc.call(&self)
       end
     end
 
@@ -2111,7 +2111,7 @@ class TestRefinement < Test::Unit::TestCase
       }
 
       def call
-        ToProc.call &self
+        ToProc.call(&self)
       end
     end
 
@@ -2127,14 +2127,14 @@ class TestRefinement < Test::Unit::TestCase
       }
 
       def call
-        ToProc.call &self
+        ToProc.call(&self)
       end
     end
 
 
     class NonProc
       def call
-        ToProc.call &self
+        ToProc.call(&self)
       end
     end
 
@@ -2144,7 +2144,7 @@ class TestRefinement < Test::Unit::TestCase
       end
 
       def call
-        ToProc.call &self
+        ToProc.call(&self)
       end
       end
 
@@ -2163,7 +2163,7 @@ class TestRefinement < Test::Unit::TestCase
       }
 
       def call
-        ToProc.call &self
+        ToProc.call(&self)
       end
     end
 
@@ -2182,7 +2182,7 @@ class TestRefinement < Test::Unit::TestCase
       }
 
       def call
-        ToProc.call &self
+        ToProc.call(&self)
       end
     end
   end