Fix \@ifundefined check for covexample(s)

Fixes: #10340

diff --git a/lib/layouts/linguistics.module b/lib/layouts/linguistics.module
index a3a4002cc286e53ff8bdd61fb1c13ad1488956b2..c2f3df1e335dd022ef510216be6b5885b2f5f118 100644 (file)
--- a/lib/layouts/linguistics.module
+++ b/lib/layouts/linguistics.module
@@ -35,7 +35,7 @@ Style Numbered_Example_(multiline)
        % This code can be removed eventually
        \@ifundefined{covexample}{%
            \newenvironment{covexample}{\begin{example}}{\end{example}}%
-       }
+       }{}
        EndPreamble
        Category              Linguistics
 End
@@ -56,7 +56,7 @@ Style Numbered_Examples_(consecutive)
        % This code can be removed eventually
        \@ifundefined{covexamples}{%
            \newenvironment{covexamples}{\begin{examples}}{\end{examples}}%
-       }
+       }{}
        EndPreamble
 End