numeric.rb: refactor code (Avoid using {...} for multi-line blocks, Surrounding space missing in default value assignment)

mrblib/numeric.rb

@@ -100,7 +100,7 @@ module Integral
   # Calls the given block from +self+ to +num+
   # incremented by +step+ (default 1).
   #
-  def step(num, step=1, &block)
+  def step(num, step = 1, &block)
     raise ArgumentError, "step can't be 0" if step == 0
     return to_enum(:step, num, step) unless block_given?
 
@@ -165,16 +165,12 @@ class Float
   # floats should be compatible to integers.
   def >> other
     n = self.to_i
-    other.to_i.times {
-      n /= 2
-    }
+    other.to_i.times { n /= 2 }
     n
   end
   def << other
     n = self.to_i
-    other.to_i.times {
-      n *= 2
-    }
+    other.to_i.times { n *= 2 }
     n.to_i
   end
 end