wrap method arguments by parentheses as convention

mrblib/numeric.rb

@@ -69,7 +69,7 @@ class Integer
   # Calls the given block +self+ times.
   #
   # ISO 15.2.8.3.22
-  def times &block
+  def times(&block)
     return to_enum :times unless block
 
     i = 0

test/t/bs_block.rb

@@ -313,7 +313,7 @@ assert('BS Block 25') do
 end
 
 assert('BS Block 26') do
-  def m a
+  def m(a)
     yield a
   end
   assert_equal(2) do

test/t/class.rb

@@ -40,7 +40,7 @@ assert('Class#new', '15.2.3.3.3') do
   end
 
   class TestClass
-    def initialize args, &block
+    def initialize(args, &block)
       @result = if not args.nil? and block.nil?
         # only arguments
         :only_args

test/t/float.rb

@@ -216,7 +216,7 @@ assert('Float#truncate', '15.2.9.3.15') do
 end
 
 assert('Float#divmod') do
-  def check_floats exp, act
+  def check_floats(exp, act)
     assert_float exp[0], act[0]
     assert_float exp[1], act[1]
   end