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-rw-r--r--generic/proof-site.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/proof-site.el b/generic/proof-site.el
index 7e4560cf..64ee3b61 100644
--- a/generic/proof-site.el
+++ b/generic/proof-site.el
@@ -74,7 +74,7 @@ NB: To change proof assistant, you must start a new Emacs session."
(fileregexp
(cond ((eq proof-assistant 'coq) "\\.v")
((eq proof-assistant 'lego) "\\.l$")
- ((eq proof-assistant 'isa) "\\.ML$|\\.thy$")))
+ ((eq proof-assistant 'isa) "\\.ML$\\|\\.thy$")))
(assistant-name (symbol-name proof-assistant))
(proof-mode (intern (concat assistant-name "-mode"))))
(setq auto-mode-alist