Swift: Fix typos.

Author: geoffw0

swift/ql/lib/codeql/swift/security/CleartextLoggingExtensions.qll

@@ -30,7 +30,7 @@ private class DefaultCleartextLoggingSink extends CleartextLoggingSink {
 }
 
 /**
- * An barrier for cleartext logging vulnerabilities.
+ * A barrier for cleartext logging vulnerabilities.
  *  - encryption; encrypted values are not cleartext.
  *  - booleans; these are more likely to be settings, rather than actual sensitive data.
  */

swift/ql/lib/codeql/swift/security/CleartextStorageDatabaseExtensions.qll

@@ -114,7 +114,7 @@ private class CleartextStorageDatabaseSinks extends SinkModelCsv {
 }
 
 /**
- * An barrier for cleartext database storage vulnerabilities.
+ * A barrier for cleartext database storage vulnerabilities.
  *  - encryption; encrypted values are not cleartext.
  *  - booleans; these are more likely to be settings, rather than actual sensitive data.
  */

swift/ql/lib/codeql/swift/security/CleartextStoragePreferencesExtensions.qll

@@ -78,7 +78,7 @@ private class NSUserDefaultsControllerStore extends CleartextStoragePreferencesS
 }
 
 /**
- * An barrier for cleartext preferences storage vulnerabilities.
+ * A barrier for cleartext preferences storage vulnerabilities.
  *  - encryption; encrypted values are not cleartext.
  *  - booleans; these are more likely to be settings, rather than actual sensitive data.
  */

swift/ql/lib/codeql/swift/security/CleartextTransmissionExtensions.qll

@@ -49,7 +49,7 @@ private class AlamofireTransmittedSink extends CleartextTransmissionSink {
 }
 
 /**
- * An barrier for cleartext transmission vulnerabilities.
+ * A barrier for cleartext transmission vulnerabilities.
  *  - encryption; encrypted values are not cleartext.
  *  - booleans; these are more likely to be settings, rather than actual sensitive data.
  */