* remove trailing spaces.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50407 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

rational.c

@@ -2465,7 +2465,7 @@ nurat_s_convert(int argc, VALUE *argv, VALUE klass)
  * a/b (b>0).  Where a is numerator and b is denominator.  Integer a
  * equals rational a/1 mathematically.
  *
- * In ruby, you can create rational object with Rational, to_r, 
+ * In ruby, you can create rational object with Rational, to_r,
  * rationalize method or suffixing r to a literal.  The return values will be irreducible.
  *
  *    Rational(1)      #=> (1/1)