Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: MathiasVP

cpp/ql/lib/semmle/code/cpp/dataflow/ExternalFlow.qll

@@ -1041,7 +1041,7 @@ private module Cached {
     av.isFalse() and result.asBooleanValue() = false
     or
     // NOTE: The below cases don't contribute anything currently since the
-    // callers immediate uses `.asBooleanValue()` to convert the `GuardValue`
+    // callers immediately use `.asBooleanValue()` to convert the `GuardValue`
     // to a boolean. Once we're willing to accept the breaking change of
     // converting the barrier guard API to use `GuardValue`s instead `Boolean`s
     // we can remove this restriction.

cpp/ql/test/library-tests/dataflow/ir-barrier-guards/test.cpp

@@ -20,7 +20,6 @@ bool is_clean_value(int*);
 int* get_clean_pointer(int* x) { return x; }
 bool is_clean_pointer(int*);
 
-void sink(int);
 void sink(int*);
 
 void test_mad(int x, int* p) {

cpp/ql/test/library-tests/dataflow/ir-barrier-guards/test.ext.yml

@@ -6,8 +6,8 @@ extensions:
       - ["", "", False, "get_clean_pointer", "", "", "ReturnValue", "test-barrier", "manual"]
       - ["", "", False, "get_clean_data", "", "", "ReturnValue[*]", "test-barrier", "manual"]
   - addsTo:
-        pack: codeql/cpp-all
-        extensible: barrierGuardModel
+      pack: codeql/cpp-all
+      extensible: barrierGuardModel
     data:
       - ["", "", False, "is_clean_value", "", "", "Argument[*0]", "true", "test-barrier", "manual"]
       - ["", "", False, "is_clean_pointer", "", "", "Argument[0]", "true", "test-barrier", "manual"]