Typo

l3kernel/l3sys.dtx

@@ -262,7 +262,7 @@
 %   detected, and the \meta{false code} otherwise.
 %
 %   \emph{Note}: It is not possible to tell from \TeX{} if a command is allowed
-%   in resticted shell escape. If restricted escape is enabled, the
+%   in restricted shell escape. If restricted escape is enabled, the
 %   \texttt{true} branch is taken: if the command is forbidden at this stage, a
 %   low-level \TeX{} error will arise.
 % \end{function}