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=== modified file 'lisp/hexl.el'
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--- lisp/hexl.el	2010-01-13 08:35:10 +0000
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+++ lisp/hexl.el	2010-01-14 00:38:04 +0000
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@@ -779,7 +779,7 @@
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 (defun hexl-printable-character (ch)
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   "Return a displayable string for character CH."
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-  (format "%c" (if hexl-iso
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+  (format "%c" (if (not (equal hexl-iso ""))
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 		   (if (or (< ch 32) (and (>= ch 127) (< ch 160)))
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 		       46
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 		     ch)