Add missing stdlib requires.

myronmarston · mcmire · commit c70538406a89 · 2020-09-03T08:51:16.000-06:00
When using super_diff in an RSpec suite that does not load `set`
or `delegate` from the standard library, I was getting errors:

* `NameError: uninitialized constant SuperDiff::RecursionGuard::Set`
* `NameError: uninitialized constant SuperDiff::OperationTrees::SimpleDelegator`

The requires added here fix these errors.

super_diff should load all parts of the stdlib it uses rather than
assuming other things load them.
diff --git a/lib/super_diff/operation_trees/base.rb b/lib/super_diff/operation_trees/base.rb
@@ -1,3 +1,5 @@
+require 'delegate'
+
 module SuperDiff
   module OperationTrees
     class Base < SimpleDelegator
diff --git a/lib/super_diff/recursion_guard.rb b/lib/super_diff/recursion_guard.rb
@@ -1,3 +1,5 @@
+require 'set'
+
 module SuperDiff
   module RecursionGuard
     RECURSION_GUARD_KEY = "super_diff_recursion_guard_key".freeze

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,5 @@`
	`1`	`+require 'delegate'`
	`2`	`+`
`1`	`3`	`module SuperDiff`
`2`	`4`	`module OperationTrees`
`3`	`5`	`class Base < SimpleDelegator`
Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,5 @@`
	`1`	`+require 'set'`
	`2`	`+`
`1`	`3`	`module SuperDiff`
`2`	`4`	`module RecursionGuard`
`3`	`5`	`RECURSION_GUARD_KEY = "super_diff_recursion_guard_key".freeze`