Disable undo in lsp-log buffer. (#2376)

Author: jcs090218

lsp-mode.el

@@ -1212,6 +1212,7 @@ FORMAT and ARGS i the same as for `message'."
       (unless log-buffer
         (setq log-buffer (get-buffer-create "*lsp-log*"))
         (with-current-buffer log-buffer
+          (buffer-disable-undo)
           (view-mode 1)
           (set (make-local-variable 'lsp--log-lines) 0)))
       (with-current-buffer log-buffer