ssh-cipher: rustdoc fixup (#521)

Author: tarcieri

ssh-cipher/src/lib.rs

@@ -123,16 +123,16 @@ impl Cipher {
     /// Decode cipher algorithm from the given `ciphername`.
     ///
     /// # Supported cipher names
-    /// `aes128-cbc`
-    /// `aes192-cbc`
-    /// `aes256-cbc`
-    /// `aes128-ctr`
-    /// `aes192-ctr`
-    /// `aes256-ctr`
-    /// `aes128-gcm@openssh.com`
-    /// `aes256-gcm@openssh.com`
-    /// `chacha20-poly1305@openssh.com`
-    /// `3des-cbc`
+    /// - `aes128-cbc`
+    /// - `aes192-cbc`
+    /// - `aes256-cbc`
+    /// - `aes128-ctr`
+    /// - `aes192-ctr`
+    /// - `aes256-ctr`
+    /// - `aes128-gcm@openssh.com`
+    /// - `aes256-gcm@openssh.com`
+    /// - `chacha20-poly1305@openssh.com`
+    /// - `3des-cbc`
     ///
     /// # Errors
     /// Returns [`LabelError`] if the provided `ciphername` is unknown.