Remove raw string notation

Makes it fiddlier to add new domains, and is only needed to generate the
regular expression. Much cleaner to just insert them as part of
generating the regular expression.

app/utils.py

@@ -439,42 +439,42 @@ class NotGovernmentDomain(Exception):
 class GovernmentDomain:
 
     domains = [
-        r"gov\.uk",
-        r"mod\.uk",
-        r"mil\.uk",
-        r"ddc-mod\.org",
-        r"slc\.co\.uk",
-        r"gov\.scot",
-        r"parliament\.uk",
-        r"nhs\.uk",
-        r"nhs\.net",
-        r"police\.uk",
-        r"dclgdatamart\.co\.uk",
-        r"ucds\.email",
-        r"naturalengland\.org\.uk",
-        r"hmcts\.net",
-        r"scotent\.co\.uk",
-        r"assembly\.wales",
-        r"cjsm\.net",
-        r"cqc\.org\.uk",
-        r"bl\.uk",
-        r"stfc\.ac\.uk",
-        r"wmfs\.net",
-        r"bbsrc\.ac\.uk",
-        r"acas\.org\.uk",
-        r"gov\.wales",
-        r"biglotteryfund\.org\.uk",
-        r"marinemanagement\.org\.uk",
-        r"britishmuseum\.org",
-        r"derrystrabane\.com",
-        r"highwaysengland\.co\.uk",
+        "gov.uk",
+        "mod.uk",
+        "mil.uk",
+        "ddc-mod.org",
+        "slc.co.uk",
+        "gov.scot",
+        "parliament.uk",
+        "nhs.uk",
+        "nhs.net",
+        "police.uk",
+        "dclgdatamart.co.uk",
+        "ucds.email",
+        "naturalengland.org.uk",
+        "hmcts.net",
+        "scotent.co.uk",
+        "assembly.wales",
+        "cjsm.net",
+        "cqc.org.uk",
+        "bl.uk",
+        "stfc.ac.uk",
+        "wmfs.net",
+        "bbsrc.ac.uk",
+        "acas.org.uk",
+        "gov.wales",
+        "biglotteryfund.org.uk",
+        "marinemanagement.org.uk",
+        "britishmuseum.org",
+        "derrystrabane.com",
+        "highwaysengland.co.uk",
     ]
 
     def __init__(self, email_address_or_domain):
 
         for domain in self.domains:
             if re.search(
-                r"[\.|@]({})$".format(domain),
+                "[\.|@]({})$".format(domain.replace(".", "\.")),
                 email_address_or_domain.lower()
             ):
                 return