Apply suggestions from code review

Co-authored-by: Geoffrey White <[email protected]>

Author: atorralba

swift/ql/src/queries/Security/CWE-943/PredicateInjection.qhelp

@@ -11,7 +11,7 @@ be able to change the overall meaning of the predicate.
 <p>
 When building a predicate from untrusted data, pass it to the appropriate <code>arguments</code> parameter
 during initialization, or as an array of substitution variables before evaluation, instead of appending
-or concatenating it to the body ofthe predicate.
+or concatenating it to the body of the predicate.
 </p>
 </recommendation>
 <example>

swift/ql/src/queries/Security/CWE-943/PredicateInjection.ql

@@ -1,6 +1,6 @@
 /**
  * @name Predicate built from user-controlled sources
- * @description Building a NSPredicate from user-controlled sources may lead to attackers
+ * @description Building an NSPredicate from user-controlled sources may lead to attackers
  *              changing the predicate's intended logic.
  * @kind path-problem
  * @problem.severity error