doc typo

[ci skip]

l3kernel/l3file.dtx

@@ -607,7 +607,7 @@
 %   Defines \meta{tl} to the contents of \meta{filename}.
 %   Category codes may need to be set appropriately via the \meta{setup}
 %   argument.
-%   The non-branching version sets theg \meta{tl} to |\q_no_value| if the file is
+%   The non-branching version sets the \meta{tl} to |\q_no_value| if the file is
 %   not found. The branching version runs the \meta{true code} after the
 %   assignment to \meta{tl} if the file is found, and \meta{false code}
 %   otherwise.