Remove \__kernel_msg_... usage

base/ltfilehook.dtx

@@ -31,8 +31,8 @@
 %%% From File: ltfilehook.dtx
 %
 %    \begin{macrocode}
-\providecommand\ltfilehookversion{v1.0k}
-\providecommand\ltfilehookdate{2021/05/25}
+\providecommand\ltfilehookversion{v1.0l}
+\providecommand\ltfilehookdate{2021/08/27}
 %    \end{macrocode}
 %
 %<*driver>
@@ -1383,14 +1383,15 @@
 %     \@@_file_subst_cycle_error:NN,
 %     \@@_file_subst_cycle_error:cN,
 %   }
+%   \changes{v1.0l}{2021/08/27}{Use \cs{msg_...} not \cs{__kernel_msg_...}}
 %   Showing this type of error expandably is tricky, as we have a very
 %   limited amount of characters to show and a potentially large list.
 %   As a work around, several errors are printed, each showing one step
 %   of the loop, until all the error messages combined show the loop.
 %    \begin{macrocode}
 \cs_new:Npn \@@_file_subst_cycle_error:NN #1 #2
   {
-    \__kernel_msg_expandable_error:nnff { kernel } { file-cycle }
+    \msg_expandable_error:nnff { latex2e } { file-cycle }
       {#1} { \use:c { @file-subst@ #1 } }
     \token_if_eq_meaning:NNF #1 #2
       { \@@_file_subst_cycle_error:cN { @file-subst@ #1 } #2 }
@@ -1400,7 +1401,7 @@
 %
 %   And the error message:
 %    \begin{macrocode}
-\__kernel_msg_new:nnn { kernel } { file-cycle }
+\msg_new:nnn { latex2e } { file-cycle }
   { File~loop!~#1~replaced~by~#2... }
 %    \end{macrocode}
 % \end{macro}