diff --git a/scripts/create-provider-data-rs.py b/scripts/create-provider-data-rs.py
index 681872ff5..ea5d291ee 100755
--- a/scripts/create-provider-data-rs.py
+++ b/scripts/create-provider-data-rs.py
@@ -11,15 +11,17 @@ out_domains = ""
 out_ids = ""
 domains_set = set()
 
+
 def camel(name):
     words = name.split("_")
     return "".join(w.capitalize() for i, w in enumerate(words))
 
+
 def cleanstr(s):
     s = s.strip()
     s = s.replace("\n", " ")
     s = s.replace("\\", "\\\\")
-    s = s.replace("\"", "\\\"")
+    s = s.replace('"', '\\"')
     return s
 
 
@@ -64,7 +66,13 @@ def process_config_defaults(data):
     config_defaults = data.get("config_defaults", "")
     for key in config_defaults:
         value = str(config_defaults[key])
-        defaults += "        ConfigDefault { key: Config::" + camel(key) + ", value: \"" + value + "\" },\n"
+        defaults += (
+            "        ConfigDefault { key: Config::"
+            + camel(key)
+            + ', value: "'
+            + value
+            + '" },\n'
+        )
     defaults += "    ])"
     return defaults
 
@@ -88,11 +96,11 @@ def process_data(data, file):
             raise TypeError("domain used twice: " + domain)
         domains_set.add(domain)
 
-        domains += "    (\"" + domain + "\", &*" + file2varname(file) + "),\n"
+        domains += '    ("' + domain + '", &*' + file2varname(file) + "),\n"
         comment += domain + ", "
 
     ids = ""
-    ids += "    (\"" + file2id(file) + "\", &*" + file2varname(file) + "),\n"
+    ids += '    ("' + file2id(file) + '", &*' + file2varname(file) + "),\n"
 
     server = ""
     has_imap = False
@@ -120,8 +128,19 @@ def process_data(data, file):
             if username_pattern != "EMAIL" and username_pattern != "EMAILLOCALPART":
                 raise TypeError("bad username pattern")
 
-            server += ("        Server { protocol: " + protocol.capitalize() + ", socket: " + socket.capitalize() + ", hostname: \""
-            + hostname + "\", port: " + str(port) + ", username_pattern: " + username_pattern.capitalize() + " },\n")
+            server += (
+                "        Server { protocol: "
+                + protocol.capitalize()
+                + ", socket: "
+                + socket.capitalize()
+                + ', hostname: "'
+                + hostname
+                + '", port: '
+                + str(port)
+                + ", username_pattern: "
+                + username_pattern.capitalize()
+                + " },\n"
+            )
 
     opt = process_opt(data)
     config_defaults = process_config_defaults(data)
@@ -133,12 +152,16 @@ def process_data(data, file):
     before_login_hint = cleanstr(data.get("before_login_hint", ""))
     after_login_hint = cleanstr(data.get("after_login_hint", ""))
     if (not has_imap and not has_smtp) or (has_imap and has_smtp):
-        provider += "static " + file2varname(file) + ": Lazy<Provider> = Lazy::new(|| Provider {\n"
-        provider += "    id: \"" + file2id(file) + "\",\n"
+        provider += (
+            "static "
+            + file2varname(file)
+            + ": Lazy<Provider> = Lazy::new(|| Provider {\n"
+        )
+        provider += '    id: "' + file2id(file) + '",\n'
         provider += "    status: Status::" + status.capitalize() + ",\n"
-        provider += "    before_login_hint: \"" + before_login_hint + "\",\n"
-        provider += "    after_login_hint: \"" + after_login_hint + "\",\n"
-        provider += "    overview_page: \"" + file2url(file) + "\",\n"
+        provider += '    before_login_hint: "' + before_login_hint + '",\n'
+        provider += '    after_login_hint: "' + after_login_hint + '",\n'
+        provider += '    overview_page: "' + file2url(file) + '",\n'
         provider += "    server: vec![\n" + server + "    ],\n"
         provider += "    opt: " + opt + ",\n"
         provider += "    config_defaults: " + config_defaults + ",\n"
@@ -148,7 +171,9 @@ def process_data(data, file):
         raise TypeError("SMTP and IMAP must be specified together or left out both")
 
     if status != "OK" and before_login_hint == "":
-        raise TypeError("status PREPARATION or BROKEN requires before_login_hint: " + file)
+        raise TypeError(
+            "status PREPARATION or BROKEN requires before_login_hint: " + file
+        )
 
     # finally, add the provider
     global out_all, out_domains, out_ids
@@ -172,7 +197,7 @@ def process_file(file):
 
 def process_dir(dir):
     print("processing directory: {}".format(dir), file=sys.stderr)
-    files = sorted(f for f in dir.iterdir() if f.suffix == '.md')
+    files = sorted(f for f in dir.iterdir() if f.suffix == ".md")
     for f in files:
         process_file(f)
 
@@ -181,31 +206,41 @@ if __name__ == "__main__":
     if len(sys.argv) < 2:
         raise SystemExit("usage: update.py DIR_WITH_MD_FILES > data.rs")
 
-    out_all = ("// file generated by src/provider/update.py\n\n"
-    "use crate::provider::Protocol::*;\n"
-    "use crate::provider::Socket::*;\n"
-    "use crate::provider::UsernamePattern::*;\n"
-    "use crate::provider::{\n"
-    "    Config, ConfigDefault, Oauth2Authorizer, Provider, ProviderOptions, Server, Status,\n"
-    "};\n"
-    "use std::collections::HashMap;\n\n"
-    "use once_cell::sync::Lazy;\n\n")
+    out_all = (
+        "// file generated by src/provider/update.py\n\n"
+        "use crate::provider::Protocol::*;\n"
+        "use crate::provider::Socket::*;\n"
+        "use crate::provider::UsernamePattern::*;\n"
+        "use crate::provider::{\n"
+        "    Config, ConfigDefault, Oauth2Authorizer, Provider, ProviderOptions, Server, Status,\n"
+        "};\n"
+        "use std::collections::HashMap;\n\n"
+        "use once_cell::sync::Lazy;\n\n"
+    )
 
     process_dir(Path(sys.argv[1]))
 
     out_all += "pub(crate) static PROVIDER_DATA: Lazy<HashMap<&'static str, &'static Provider>> = Lazy::new(|| [\n"
-    out_all += out_domains;
+    out_all += out_domains
     out_all += "].iter().copied().collect());\n\n"
 
     out_all += "pub(crate) static PROVIDER_IDS: Lazy<HashMap<&'static str, &'static Provider>> = Lazy::new(|| [\n"
-    out_all += out_ids;
+    out_all += out_ids
     out_all += "].iter().copied().collect());\n\n"
 
     if len(sys.argv) < 3:
         now = datetime.datetime.utcnow()
     else:
         now = datetime.datetime.fromisoformat(sys.argv[2])
-    out_all += "pub static PROVIDER_UPDATED: Lazy<chrono::NaiveDate> = "\
-               "Lazy::new(|| chrono::NaiveDate::from_ymd_opt("+str(now.year)+", "+str(now.month)+", "+str(now.day)+").unwrap());\n"
+    out_all += (
+        "pub static PROVIDER_UPDATED: Lazy<chrono::NaiveDate> = "
+        "Lazy::new(|| chrono::NaiveDate::from_ymd_opt("
+        + str(now.year)
+        + ", "
+        + str(now.month)
+        + ", "
+        + str(now.day)
+        + ").unwrap());\n"
+    )
 
     print(out_all)