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+;;;; hacks.el --- a few functions to help me work on the manual
+;;;; Jim Blandy <jimb@red-bean.com> --- October 1998
+;;;; -- imported from https://git.savannah.gnu.org/cgit/guile.git/tree/doc/hacks.el
+
+(defun jh-exemplify-region (start end)
+  (interactive "r")
+  (save-excursion
+    (save-restriction
+      (narrow-to-region start end)
+
+      ;; Texinfo doesn't handle tabs well.
+      (untabify (point-min) (point-max))
+
+      ;; Quote any characters special to texinfo.
+      (goto-char (point-min))
+      (while (re-search-forward "[{}@]" nil t)
+        (replace-match "@\\&")))))