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-rw-r--r--generic/pg-vars.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/pg-vars.el b/generic/pg-vars.el
index ec673ed6..e402fb98 100644
--- a/generic/pg-vars.el
+++ b/generic/pg-vars.el
@@ -166,7 +166,7 @@ of the proof (starting from 1).")
;; compile warnings
;;
-(defvar proof-shell-last-output nil
+(defvar proof-shell-last-output ""
"A record of the last string seen from the proof system.
This is raw string, for internal use only.")