GUACAMOLE-362: Fix style and error messages.

extensions/guacamole-auth-cas/src/main/java/org/apache/guacamole/auth/cas/ticket/TicketValidationService.java

@@ -63,6 +63,7 @@ public class TicketValidationService {
      *
      * @param ticket
      *     The ID ticket to validate and parse.
+     *
      * @param credentials
      *     The Credentials object to store retrieved username and
      *     password values in.

guacamole-ext/src/main/java/org/apache/guacamole/properties/PrivateKeyGuacamoleProperty.java

@@ -70,10 +70,10 @@ public abstract class PrivateKeyGuacamoleProperty implements GuacamoleProperty<P
             throw new GuacamoleServerException("Could not read in the specified key file.", e);
         }
         catch (NoSuchAlgorithmException e) {
-            throw new GuacamoleServerException("Key is not in expected RSA algorithm.", e);
+            throw new GuacamoleServerException("RSA algorithm is not available.", e);
         }
         catch (InvalidKeySpecException e) {
-            throw new GuacamoleServerException("KeyS is not in expected PKCS8 encoding.", e);
+            throw new GuacamoleServerException("Key is not in expected PKCS8 encoding.", e);
         }
 
     }