Fix rustfmt errors

Author: rust1248

src/lib.rs

@@ -329,7 +329,7 @@ pub enum Protocol {
 }
 
 /// A builder for `TlsConnector`s.
-/// 
+///
 /// You can get one from [`TlsConnector::builder()`](TlsConnector::builder)
 pub struct TlsConnectorBuilder {
     identity: Option<Identity>,
@@ -519,7 +519,7 @@ impl TlsConnector {
 }
 
 /// A builder for `TlsAcceptor`s.
-/// 
+///
 /// You can get one from [`TlsAcceptor::builder()`](TlsAcceptor::builder)
 pub struct TlsAcceptorBuilder {
     identity: Identity,