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diff --git a/tools-for-build/rtf.lisp b/tools-for-build/rtf.lisp
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+;;;; Generate RTF out of a regular text file, splitting
+;;;; paragraphs on empty lines.
+;;;;
+;;;; Used to generate License.rtf out of COPYING for the
+;;;; Windows installer.
+
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
+
+(defun read-text (pathname)
+  (let ((pars (list nil)))
+    (with-open-file (f pathname :external-format :ascii)
+      (loop for line = (read-line f nil)
+            for text = (string-trim '(#\Space #\Tab) line)
+            while line
+            when (plusp (length text))
+            do (setf (car pars)
+                     (if (car pars)
+                         (concatenate 'string (car pars) " " text)
+                         text))
+            else
+            do (push nil pars)))
+    (nreverse pars)))
+
+(defun write-rtf (pars pathname)
+  (with-open-file (f pathname :direction :output :external-format :ascii
+                     :if-exists :supersede)
+    ;; \rtf0 = RTF 1.0
+    ;; \ansi = character set
+    ;; \deffn = default font
+    ;; \fonttbl = font table
+    ;; \fs = font size in half-points
+    (format f "{\\rtf1\\ansi~
+                \\deffn0~
+                {\\fonttbl\\f0\\fswiss Helvetica;}~
+                \\fs20~
+                ~{~A\\par\\par~%~}}~%"
+                         pars)))