typo #7260 (comment)

Author: fhanik

saml2/saml2-service-provider/src/main/java/org/springframework/security/saml2/serviceprovider/provider/RelyingPartyRegistration.java

@@ -33,7 +33,7 @@
 
 /**
  * Represents a configured service provider, SP, and a remote identity provider, IDP, pair.
- * Each SP/IDP pair is uniquely identified using a <code>registrationId</code>, and arbitrary string.
+ * Each SP/IDP pair is uniquely identified using a <code>registrationId</code>, an arbitrary string.
  * A fully configured registration may look like
  * <pre>
  *		//remote IDP entity ID