diff --git a/scripts/supportedsites.py b/scripts/supportedsites.py
index 74fcff6e..ddbcbb46 100755
--- a/scripts/supportedsites.py
+++ b/scripts/supportedsites.py
@@ -682,52 +682,50 @@ COLUMNS = (
 def generate_output(columns, categories, domains):
 
     thead = []
-    append = thead.append
-    append("<tr>")
+    thead.append("<tr>")
     for column in columns:
-        append("    <th>" + column[0] + "</th>")
-    append("</tr>")
+        thead.append(f"    <th>{column[0]}</th>")
+    thead.append("</tr>")
 
     tbody = []
-    append = tbody.append
-
     for bcat, base in categories.items():
 
         if bcat and base:
             name = BASE_MAP.get(bcat) or (bcat.capitalize() + " Instances")
-            append('\n<tr>\n    <td colspan="4"><strong>' +
-                   name + '</strong></td>\n</tr>')
+            tbody.append(f"""
+<tr>
+    <td colspan="4"><strong>{name}</strong></td>
+</tr>\
+""")
             clist = base.items()
         else:
             clist = sorted(base.items(), key=category_key)
 
         for category, subcategories in clist:
-            append("<tr>")
+            tbody.append("<tr>")
             for column in columns:
                 domain = domains[category]
                 content = column[2](bcat, category, subcategories, domain)
-                append("    <td>" + content + "</td>")
-            append("</tr>")
+                tbody.append(f"    <td>{content}</td>")
+            tbody.append("</tr>")
 
-    TEMPLATE = """# Supported Sites
+    NL = "\n"
+    GENERATOR = "/".join(os.path.normpath(__file__).split(os.sep)[-2:])
+    return f"""\
+# Supported Sites
 
-<!-- auto-generated by {} -->
+<!-- auto-generated by {GENERATOR} -->
 Consider all listed sites to potentially be NSFW.
 
 <table>
 <thead valign="bottom">
-{}
+{NL.join(thead)}
 </thead>
 <tbody valign="top">
-{}
+{NL.join(tbody)}
 </tbody>
 </table>
 """
-    return TEMPLATE.format(
-        "/".join(os.path.normpath(__file__).split(os.sep)[-2:]),
-        "\n".join(thead),
-        "\n".join(tbody),
-    )
 
 
 categories, domains = build_extractor_list()