Refactor AV number helper tests with invalid numbers

Just make use of the returning exception from assert_raise, instead of
calling the method again with a rescue clause to test the saved
exception number.

actionpack/test/template/number_helper_test.rb

@@ -361,69 +361,39 @@ def test_number_helpers_outputs_are_html_safe
   end
 
   def test_number_helpers_should_raise_error_if_invalid_when_specified
-    assert_raise InvalidNumberError do
+    exception = assert_raise InvalidNumberError do
       number_to_human("x", :raise => true)
     end
-    begin
-      number_to_human("x", :raise => true)
-    rescue InvalidNumberError => e
-      assert_equal "x", e.number
-    end
+    assert_equal "x", exception.number
 
-    assert_raise InvalidNumberError do
-      number_to_human_size("x", :raise => true)
-    end
-    begin
+    exception = assert_raise InvalidNumberError do
       number_to_human_size("x", :raise => true)
-    rescue InvalidNumberError => e
-      assert_equal "x", e.number
     end
+    assert_equal "x", exception.number
 
-    assert_raise InvalidNumberError do
+    exception = assert_raise InvalidNumberError do
       number_with_precision("x", :raise => true)
     end
-    begin
-      number_with_precision("x", :raise => true)
-    rescue InvalidNumberError => e
-      assert_equal "x", e.number
-    end
+    assert_equal "x", exception.number
 
-    assert_raise InvalidNumberError do
+    exception = assert_raise InvalidNumberError do
       number_to_currency("x", :raise => true)
     end
-    begin
-      number_with_precision("x", :raise => true)
-    rescue InvalidNumberError => e
-      assert_equal "x", e.number
-    end
+    assert_equal "x", exception.number
 
-    assert_raise InvalidNumberError do
+    exception = assert_raise InvalidNumberError do
       number_to_percentage("x", :raise => true)
     end
-    begin
-      number_to_percentage("x", :raise => true)
-    rescue InvalidNumberError => e
-      assert_equal "x", e.number
-    end
+    assert_equal "x", exception.number
 
-    assert_raise InvalidNumberError do
-      number_with_delimiter("x", :raise => true)
-    end
-    begin
+    exception = assert_raise InvalidNumberError do
       number_with_delimiter("x", :raise => true)
-    rescue InvalidNumberError => e
-      assert_equal "x", e.number
     end
+    assert_equal "x", exception.number
 
-    assert_raise InvalidNumberError do
+    exception = assert_raise InvalidNumberError do
       number_to_phone("x", :raise => true)
     end
-    begin
-      number_to_phone("x", :raise => true)
-    rescue InvalidNumberError => e
-      assert_equal "x", e.number
-    end
-
+    assert_equal "x", exception.number
   end
-
 end