Add missing bigmath precision test, add missing indent (#450)

Author: tompng

test/bigdecimal/test_bigdecimal.rb

@@ -2064,7 +2064,7 @@ def test_sqrt_with_huge_limit
     end
   end
 
-def test_power_with_huge_limit
+  def test_power_with_huge_limit
     BigDecimal.save_limit do
       x = BigDecimal("12.34")
       y = BigDecimal("56.78")

test/bigdecimal/test_bigmath.rb

@@ -60,9 +60,11 @@ def test_consistent_precision_acceptance
     assert_consistent_precision_acceptance(accept_zero: true) {|prec| x.mult(x, prec) }
     assert_consistent_precision_acceptance(accept_zero: true) {|prec| x.power(x, prec) }
     assert_consistent_precision_acceptance(accept_zero: true) {|prec| x.sqrt(prec) }
-    assert_consistent_precision_acceptance {|prec| BigMath.sqrt(x, prec) }
     assert_consistent_precision_acceptance {|prec| BigMath.exp(x, prec) }
     assert_consistent_precision_acceptance {|prec| BigMath.log(x, prec) }
+    assert_consistent_precision_acceptance {|prec| BigMath.sqrt(x, prec) }
+    assert_consistent_precision_acceptance {|prec| BigMath.cbrt(x, prec) }
+    assert_consistent_precision_acceptance {|prec| BigMath.hypot(x, x + 1, prec) }
     assert_consistent_precision_acceptance {|prec| BigMath.sin(x, prec) }
     assert_consistent_precision_acceptance {|prec| BigMath.cos(x, prec) }
     assert_consistent_precision_acceptance {|prec| BigMath.tan(x, prec) }