Update tests for json{}

On the assumption that this is currently correct
but the tests were never updated after the formatter changed.

Closes #80.

tests/expected_output.txt

@@ -10,7 +10,7 @@ a92e50c09cd56970625ac3b74efbddb83b2731bb table li
 66950e746590d7f4e9cfe3d1adef42cd0addcf1d table li:last-of-type
 0a37d612cd4c67a42bd147b1edc5a1128456b017 table a[title="The Practice of Programming"]
 0d3918d54f868f13110262ffbb88cbb0b083057d table a[title="The Practice of Programming"] text{}
-ecb542a30fc75c71a0c6380692cbbc4266ccbce4 json{}
+199188dc8f1522426a628e41d96264bffb8beb0f json{}
 95ef88ded9dab22ee3206cca47b9c3a376274bda text{}
 e4f7358fbb7bb1748a296fa2a7e815fa7de0a08b .after-portlet
 da39a3ee5e6b4b0d3255bfef95601890afd80709 .after
@@ -34,7 +34,7 @@ d314e83b059bb876b0e5ee76aa92d54987961f9a .navbox-list li:nth-last-child(1)
 613bf65ac4042b6ee0a7a47f08732fdbe1b5b06b #toc
 da39a3ee5e6b4b0d3255bfef95601890afd80709 #toc li + a
 da39a3ee5e6b4b0d3255bfef95601890afd80709 #toc li + a text{}
-97d170e1550eee4afc0af065b78cda302a97674c #toc li + a json{}
+cd0d4cc32346750408f7d4f5e78ec9a6e5b79a0d #toc li + a json{}
 da39a3ee5e6b4b0d3255bfef95601890afd80709 #toc li + a + span
 da39a3ee5e6b4b0d3255bfef95601890afd80709 #toc li + span
 da39a3ee5e6b4b0d3255bfef95601890afd80709 #toc li > li