Show '\011', '\012', and '\015' as '\t', '\n', '\r' in strings.
Switch from octal escapes to hex escapes for other nonprintable characters.
diff --git a/Doc/lib/librotor.tex b/Doc/lib/librotor.tex
index ba7c402..e1db8ef 100644
--- a/Doc/lib/librotor.tex
+++ b/Doc/lib/librotor.tex
@@ -68,17 +68,17 @@
>>> import rotor
>>> rt = rotor.newrotor('key', 12)
>>> rt.encrypt('bar')
-'\2534\363'
+'\xab4\xf3'
>>> rt.encryptmore('bar')
-'\357\375$'
+'\xef\xfd$'
>>> rt.encrypt('bar')
-'\2534\363'
->>> rt.decrypt('\2534\363')
+'\xab4\xf3'
+>>> rt.decrypt('\xab4\xf3')
'bar'
->>> rt.decryptmore('\357\375$')
+>>> rt.decryptmore('\xef\xfd$')
'bar'
->>> rt.decrypt('\357\375$')
-'l(\315'
+>>> rt.decrypt('\xef\xfd$')
+'l(\xcd'
>>> del rt
\end{verbatim}