copyright.tex: Add 1995 to copyright message.
lib.tex: add libimp; remove bogus warning about lineii.
libmath.tex: document hypot().
libmd5.tex: rename md5.md5() to md5.new().
libposix.tex: document chown().
libposixfile.tex: openfile() instead of fileopen().
libsocket.tex: document gethostbyaddr().
libtypes.tex: add footnote explaining why readline() keeps the newline.
ref3.tex: correct typos, add back*quotes to index.
ref4.tex: don't use \verb inside footnote.
ref5.tex: explain repr() and str() and add them + back*quotes to index.
ref6.tex: correct typo, don't use \verb in footnote.
ref7.tex: don't use \verb in footnote.
diff --git a/Doc/ref/ref4.tex b/Doc/ref/ref4.tex
index c4c4abc..0198117 100644
--- a/Doc/ref/ref4.tex
+++ b/Doc/ref/ref4.tex
@@ -72,9 +72,9 @@
searched in the list of ``built-in'' names (which is actually the
global name space of the module \verb@__builtin__@). When a name is not
found at all, the \verb@NameError@ exception is raised.%
-\footnote{If the code block contains \verb@exec@ statements or the
-construct \verb@from ... import *@, the semantics of names not
-explicitly mentioned in a \verb@global@ statement change subtly: name
+\footnote{If the code block contains {\tt exec} statements or the
+construct {\tt from \ldots import *}, the semantics of names not
+explicitly mentioned in a {\tt global} statement change subtly: name
lookup first searches the local name space, then the global one, then
the built-in one.}