* lib/mathn.rb: removed commented-out code.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47280 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Tue Aug 26 09:25:03 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* lib/mathn.rb: removed commented-out code.
+
 Mon Aug 25 20:15:50 2014  Masaki Suketa <masaki.suketa@nifty.ne.jp>
 
 	* ext/win32ole/win32ole.c(fole_s_connect, fole_initialize): raise a

lib/mathn.rb

@@ -226,14 +226,8 @@ module Math
   def sqrt(a)
     if a.kind_of?(Complex)
       abs = sqrt(a.real*a.real + a.imag*a.imag)
-#      if not abs.kind_of?(Rational)
-#        return a**Rational(1,2)
-#      end
       x = sqrt((a.real + abs)/Rational(2))
       y = sqrt((-a.real + abs)/Rational(2))
-#      if !(x.kind_of?(Rational) and y.kind_of?(Rational))
-#        return a**Rational(1,2)
-#      end
       if a.imag >= 0
         Complex(x, y)
       else