Address review comments

Author: hvitved

ruby/ql/lib/codeql/ruby/ApiGraphs.qll

@@ -98,7 +98,7 @@ module API {
     /**
      * Gets a `new` call to the function represented by this API component.
      */
-    DataFlow::ExprNode getAnInstantiation() { result = getInstance().getAnImmediateUse() }
+    DataFlow::ExprNode getAnInstantiation() { result = this.getInstance().getAnImmediateUse() }
 
     /**
      * Gets a node representing a subclass of the class represented by this node.

ruby/ql/lib/codeql/ruby/frameworks/StandardLibrary.qll

@@ -1110,8 +1110,8 @@ module Array {
     }
   }
 
-  private class InitializeCopySummary extends SimpleSummarizedCallable {
-    InitializeCopySummary() { this = "initialize_copy" }
+  private class ReplaceSummary extends SimpleSummarizedCallable {
+    ReplaceSummary() { this = "replace" }
 
     override predicate propagatesFlowExt(string input, string output, boolean preservesValue) {
       (