[pyupgrade] `synapse/` (#10348)

This PR is tantamount to running 
```
pyupgrade --py36-plus --keep-percent-format `find synapse/ -type f -name "*.py"`
```

Part of #9744

1 files changed, 2 insertions, 4 deletions

diff --git a/synapse/config/tls.py b/synapse/config/tls.py

index fed05ac7be..5679f05e42 100644
--- a/synapse/config/tls.py
+++ b/synapse/config/tls.py
@@ -66,10 +66,8 @@ class TlsConfig(Config):
         if self.federation_client_minimum_tls_version == "1.3":
             if getattr(SSL, "OP_NO_TLSv1_3", None) is None:
                 raise ConfigError(
-                    (
-                        "federation_client_minimum_tls_version cannot be 1.3, "
-                        "your OpenSSL does not support it"
-                    )
+                    "federation_client_minimum_tls_version cannot be 1.3, "
+                    "your OpenSSL does not support it"
                 )
 
         # Whitelist of domains to not verify certificates for