Index: generic/nsf.c
===================================================================
diff -u -r8d65f0a7b5bd040d5e0b0d353b44869e26c79e81 -rf92df553a299a7ef91e1d53656282e23441f8c87
--- generic/nsf.c	(.../nsf.c)	(revision 8d65f0a7b5bd040d5e0b0d353b44869e26c79e81)
+++ generic/nsf.c	(.../nsf.c)	(revision f92df553a299a7ef91e1d53656282e23441f8c87)
@@ -1071,7 +1071,7 @@
      *     NSF_PC_IS_DEFAULT (sanity check)
      */
     /*
-     * (1) make sure, that the status correctly reflects MUST_DECR
+     * (1) make sure that the status correctly reflects MUST_DECR
      */
     int i;
     if (status == 0u || (status & NSF_PC_STATUS_MUST_DECR) == 0u) {
@@ -14330,7 +14330,7 @@
 
 
   /*
-   * Make sure, that the current call is marked as an ensemble call, both
+   * Make sure that the current call is marked as an ensemble call, both
    * for dispatching to the default-method and for dispatching the method
    * interface of the given object. Otherwise, current introspection
    * specific to sub-methods fails (e.g., a [current method-path] in the
@@ -15696,7 +15696,7 @@
 
   /*
    * If we have a command, check the permissions, unless
-   * NSF_CM_IGNORE_PERMISSIONS is set. Note, that NSF_CM_IGNORE_PERMISSIONS is
+   * NSF_CM_IGNORE_PERMISSIONS is set. Note that NSF_CM_IGNORE_PERMISSIONS is
    * set currently for fully qualified cmd names and in nsf::object::dispatch.
    */
 
Index: generic/nsfObj.c
===================================================================
diff -u -r68df0e0f7b64227082179246fc4ab296babd2263 -rf92df553a299a7ef91e1d53656282e23441f8c87
--- generic/nsfObj.c	(.../nsfObj.c)	(revision 68df0e0f7b64227082179246fc4ab296babd2263)
+++ generic/nsfObj.c	(.../nsfObj.c)	(revision f92df553a299a7ef91e1d53656282e23441f8c87)
@@ -562,7 +562,7 @@
  * NsfMixinregInvalidate --
  *
  *      MixinClasses keep a list of Tcl_Objs of type Mixinreg.
- *      When a class is deleted, this call makes sure, that
+ *      When a class is deleted, this call makes sure that
  *      non-of these have the chance to point to a stale entry.
  *
  * Results: