Add a script to investigate JSON.load and JSON.parse

According to rurema/doctree/issues/2646, `JSON.load` calls `JSON.parse` internally. But I'm not sure it is true. This script investigate the behaviour then I learned it is true.
pocke · Jan 15, 2022 · f65b1e4 · f65b1e4
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diff --git a/2022/1/16/json_load_and_parse.rb b/2022/1/16/json_load_and_parse.rb
@@ -0,0 +1,6 @@
+require 'json'
+require 'trace_location'
+
+TraceLocation.trace(format: :log) do
+  JSON.load('{"foo": 42}')
+end
diff --git a/2022/1/16/trace_location-2022011601011642265241.log b/2022/1/16/trace_location-2022011601011642265241.log
@@ -0,0 +1,13 @@
+Logged by TraceLocation gem at 2022-01-16 01:47:21 +0900
+https://github.com/yhirano55/trace_location
+
+[Tracing events] C: Call, R: Return
+
+C /home/pocke/.rbenv/versions/trunk/lib/ruby/3.2.0/json/common.rb:557 [JSON.load]
+  C /home/pocke/.rbenv/versions/trunk/lib/ruby/3.2.0/json/common.rb:215 [JSON.parse]
+    C /home/pocke/.rbenv/versions/trunk/lib/ruby/3.2.0/json/common.rb:126 [JSON.create_id]
+    R /home/pocke/.rbenv/versions/trunk/lib/ruby/3.2.0/json/common.rb:128 [JSON.create_id]
+  R /home/pocke/.rbenv/versions/trunk/lib/ruby/3.2.0/json/common.rb:217 [JSON.parse]
+R /home/pocke/.rbenv/versions/trunk/lib/ruby/3.2.0/json/common.rb:572 [JSON.load]
+
+Result: {"foo"=>42}