diff --git a/respodns/checks.py b/respodns/checks.py
index 2f36264..45b099b 100644
--- a/respodns/checks.py
+++ b/respodns/checks.py
@@ -21,6 +21,7 @@ new = [
 likely = [
     # these checks are, in practice, the most likely
     # to weed out unwanted DNS servers.
+
     Check("news",           "huanqiu.com"),
     Check("adware",         rot13("nqf789.pbz")),
 
@@ -30,6 +31,7 @@ likely = [
 
     # some servers block piracy and porn sites for being taboo, or whatever.
     Check("porn",           "pornhub.com"),
+
     Check("adtrack",        "media.fastclick.net"),
 
     # dns.watch fails here: domain parking is evil, but servers must abide.
diff --git a/respodns/util.py b/respodns/util.py
index 6e53ccb..af18cae 100644
--- a/respodns/util.py
+++ b/respodns/util.py
@@ -5,6 +5,10 @@ for a, b, c, d in zip("anAN05", "mzMZ49", "naNA50", "zmZM94"):
                                               range(ord(c), ord(d) + 1))))
 
 
+def rot13(s):
+    return "".join(rot13_mapping.get(c, c) for c in s)
+
+
 def right_now():
     from datetime import datetime, timezone
     return datetime.now(timezone.utc)
@@ -19,15 +23,12 @@ def nonsense_consistent(domain):
     return "".join(rng.choice(ascii_lowercase) for i in range(length))
 
 
-def rot13(s):
-    return "".join(rot13_mapping.get(c, c) for c in s)
-
-
 def concat_nonsense(domain):
     return nonsense_consistent(domain) + "." + domain
 
 
 def head(n, it):
+    # TODO: maybe just do return [a for _, a in zip(range(n), it)]
     res = []
     try:
         while len(res) < n: