Call raise with parentheses like a normal method call with arguments

Using `(raise FooError, "error")` is like forcing a "new scope" around
the `raise` call, it's simpler to just wrap the `raise` arguments with
parentheses just like any other method call would.

activesupport/lib/active_support/core_ext/string/access.rb

@@ -76,7 +76,7 @@ class String
   #   str.first(0) # => ""
   #   str.first(6) # => "hello"
   def first(limit = 1)
-    self[0, limit] || (raise ArgumentError, "negative limit")
+    self[0, limit] || raise(ArgumentError, "negative limit")
   end
 
   # Returns the last character of the string. If a limit is supplied, returns a substring
@@ -90,6 +90,6 @@ class String
   #   str.last(0) # => ""
   #   str.last(6) # => "hello"
   def last(limit = 1)
-    self[[length - limit, 0].max, limit] || (raise ArgumentError, "negative limit")
+    self[[length - limit, 0].max, limit] || raise(ArgumentError, "negative limit")
   end
 end