Typos

base/ltclass.dtx

@@ -2150,7 +2150,7 @@
 %    actions prepend \cs{@currpath} to \cs{@currname} (namely loading,
 %    as we have to respect the given path).
 %
-%    A file substituiton isn't followed just yet because at this point
+%    A file substitution isn't followed just yet because at this point
 %    we are parsing user input, so the file is still what the user
 %    asked for, and not the file actually loaded.
 %    \begin{macrocode}

base/ltkeys.dtx

@@ -353,7 +353,7 @@
 %
 % \begin{macro}{\@@_options_local:}
 % \changes{v1.0h}{2022/06/20}{Use raw options data}
-%   If local options are found, the are added to the processing list.
+%   If local options are found, they are added to the processing list.
 %   \LaTeXe{} stores options for each file in a macro which may or may not
 %   exist, hence the need to use \cs{cs_if_exist:c}.
 %    \begin{macrocode}