rewrite qldoc based on review

Author: erik-krogh

javascript/ql/lib/semmle/javascript/dataflow/TaintTracking.qll

@@ -1126,9 +1126,7 @@ module TaintTracking {
     )
   }
 
-  /**
-   * Holds if `test` is of the form `typeof x === "something"`, preventing `x` from being a string in some cases.
-   */
+  /** A test for the value of `typeof x`, restricting the potential types of `x`. */
   predicate isStringTypeGuard(EqualityTest test, Expr operand, boolean polarity) {
     exists(TypeofTag tag | TaintTracking::isTypeofGuard(test, operand, tag) |
       // typeof x === "string" sanitizes `x` when it evaluates to false

javascript/ql/lib/semmle/javascript/security/dataflow/UnsafeHtmlConstructionCustomizations.qll

@@ -181,7 +181,7 @@ module UnsafeHtmlConstruction {
     override string describe() { result = "Markdown rendering" }
   }
 
-  /** A test of form `typeof x === "something"`, preventing `x` from being a string in some cases. */
+  /** A test for the value of `typeof x`, restricting the potential types of `x`. */
   class TypeTestGuard extends TaintTracking::SanitizerGuardNode, DataFlow::ValueNode {
     override EqualityTest astNode;
     Expr operand;

javascript/ql/lib/semmle/javascript/security/dataflow/XssThroughDomQuery.qll

@@ -51,7 +51,7 @@ class Configuration extends TaintTracking::Configuration {
   }
 }
 
-/** A test of form `typeof x === "something"`, preventing `x` from being a string in some cases. */
+/** A test for the value of `typeof x`, restricting the potential types of `x`. */
 class TypeTestGuard extends TaintTracking::SanitizerGuardNode, DataFlow::ValueNode {
   override EqualityTest astNode;
   Expr operand;