diff --git a/runtime/doc/insert.txt b/runtime/doc/insert.txt
index 51a919d..419213d 100644
--- a/runtime/doc/insert.txt
+++ b/runtime/doc/insert.txt
@@ -2008,10 +2008,10 @@
 changed, the detected format is only used while reading the file.
 A similar thing happens with 'fileencodings'.
 
-On non-MS-DOS and Win32 systems the message "[dos format]" is shown if a file
-is read in DOS format, to remind you that something unusual is done.  On
-Macintosh and Win32 the message "[unix format]" is shown if a file is read in
-Unix format.
+The message "[dos format]" is shown if a file is read in DOS format, to remind
+you that something unusual is done.
+On Macintosh and Win32 the message "[unix format]" is shown if a file is read
+in Unix format.
 On non-Macintosh systems, the message "[Mac format]" is shown if a file is
 read in Mac format.