[Fix #2561] Disable undo in *cider-test-report* buffers

Author: bbatsov

CHANGELOG.md

@@ -9,6 +9,7 @@
 ### Bugs fixed
 
 - Remove needless quotes from the choices of `cider-jack-in-auto-inject-clojure`
+- [#2561](https://github.com/clojure-emacs/cider/issues/2561): Disable undo in `*cider-test-report*` buffers.
 
 ## 1.5.0 (2022-08-24)
 

cider-test.el

@@ -217,7 +217,8 @@ Add to this list to have CIDER recognize additional test defining macros."
   (when cider-special-mode-truncate-lines
     (setq-local truncate-lines t))
   (setq-local sesman-system 'CIDER)
-  (setq-local electric-indent-chars nil))
+  (setq-local electric-indent-chars nil)
+  (buffer-disable-undo))
 
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