From ec0e4eb918fc6d95abd5f92b9bea0464662e7245 Mon Sep 17 00:00:00 2001
From: Pierre-Marie Pédrot
Date: Tue, 24 Jul 2018 11:07:04 +0200
Subject: Update the documentation w.r.t. the new error raised by unify.

---
 doc/sphinx/proof-engine/tactics.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/sphinx/proof-engine/tactics.rst b/doc/sphinx/proof-engine/tactics.rst
index ec085a71e5..89668a2d7e 100644
--- a/doc/sphinx/proof-engine/tactics.rst
+++ b/doc/sphinx/proof-engine/tactics.rst
@@ -3976,7 +3976,7 @@ succeeds, and results in an error otherwise.
    This tactic checks whether its arguments are unifiable, potentially
    instantiating existential variables.
 
-.. exn:: Not unifiable.
+.. exn:: Unable to unify @term with @term.
 
 .. tacv:: unify @term @term with @ident
 
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