Add clarification comment.

llvm/lib/Transforms/Yk/ModuleClone.cpp

@@ -75,14 +75,16 @@ struct YkModuleClone : public ModulePass {
    * If cloned function calls are identified within the original function
    * instructions, they are redirected to the original function instead.
    *
-   * **Example Scenario:**
+   * **Example Scenario (before calling `updateFunctionCalls` function):**
    * - Function `f` calls function `g`.
-   * - Function `g` is cloned as `__yk_clone_g`.
+   * - Function `g` is cloned as `__yk_clone_g` and all its callsites
+   * are updated appropriately.
    * - Function `f` is not cloned because its address is taken.
    * - As a result, function `f` calls `__yk_clone_g` instead of `g`.
    *
    * **Reasoning:**
-   * In `YkIRWriter` we only serialise non-cloned functions.
+   * In `YkIRWriter` we only serialise non-cloned functions. We want
+   * original functions to call only original functions.
    *
    * @param FinalModule The module containing both original and cloned
    * functions.