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.

Doc/ref/ref3.tex

@@ -470,7 +470,7 @@ A file object represents an open file.  (It is a wrapper around a C
 \verb@open()@ built-in function, and also by \verb@posix.popen()@ and
 the \verb@makefile@ method of socket objects.  \verb@sys.stdin@,
 \verb@sys.stdout@ and \verb@sys.stderr@ are file objects corresponding
-the the interpreter's standard input, output and error streams.
+to the interpreter's standard input, output and error streams.
 See the Python Library Reference for methods of file objects and other
 details.
 \obindex{file}
@@ -498,7 +498,7 @@ but they are mentioned here for completeness.
 Code objects represent executable code.  The difference between a code
 object and a function object is that the function object contains an
 explicit reference to the function's context (the module in which it
-was defined) which a code object contains no context.  There is no way
+was defined) while a code object contains no context.  There is no way
 to execute a bare code object.
 \obindex{code}
 
@@ -622,8 +622,12 @@ former decrements the reference count for \code{x} by one, but
 \code{x,__del__} is only called when its reference count reaches zero.
 
 \item[\tt __repr__(self)]
-Called by the \verb@repr()@ built-in function and by conversions
-(reverse quotes) to compute the string representation of an object.
+Called by the \verb@repr()@ built-in function and by string conversions
+(reverse or backward quotes) to compute the string representation of an object.
+\indexii{string}{conversion}
+\indexii{reverse}{quotes}
+\indexii{backward}{quotes}
+\index{back-quotes}
 
 \item[\tt __str__(self)]
 Called by the \verb@str()@ built-in function and by the \verb@print@

Doc/ref/ref4.tex

@@ -72,9 +72,9 @@ When a global name is not found in the global name space, it is
 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.}
 

Doc/ref/ref5.tex

@@ -187,6 +187,9 @@ value prevails.
 
 \subsection{String conversions}
 \indexii{string}{conversion}
+\indexii{reverse}{quotes}
+\indexii{backward}{quotes}
+\index{back-quotes}
 
 A string conversion is a condition list enclosed in reverse (or
 backward) quotes:
@@ -214,6 +217,13 @@ dictionaries that contain a reference to themselves, directly or
 indirectly.)
 \obindex{recursive}
 
+The built-in function \verb@repr()@ performs exactly the same
+conversion in its argument as enclosing it it reverse quotes does.
+The built-in function \verb@str()@ performs a similar but more
+user-friendly conversion.
+\bifuncindex{repr}
+\bifuncindex{str}
+
 \section{Primaries} \label{primaries}
 \index{primary}
 

Doc/ref/ref6.tex

@@ -166,7 +166,7 @@ sequence cannot add new items to a list).
 
 If the primary is a mapping (dictionary) object, the subscript must
 have a type compatible with the mapping's key type, and the mapping is
-then asked to to create a key/datum pair which maps the subscript to
+then asked to create a key/datum pair which maps the subscript to
 the assigned object.  This can either replace an existing key/value
 pair with the same key value, or insert a new key/value pair (if no
 key with the same value existed).
@@ -369,7 +369,7 @@ continue_stmt:  "continue"
 \verb@continue@ may only occur syntactically nested in a \verb@for@ or
 \verb@while@ loop, but not nested in a function or class definition or
 \verb@try@ statement within that loop.\footnote{Except that it may
-currently occur within an \verb@except@ clause.}
+currently occur within an {\tt except} clause.}
 \stindex{for}
 \stindex{while}
 \indexii{loop}{statement}

Doc/ref/ref7.tex

@@ -299,7 +299,7 @@ default value is substituted.  If a parameter has a default value, all
 following parameters must also have a default value --- this is a
 syntactic restriction that is not expressed by the grammar.%
 \footnote{Currently this is not checked; instead,
-\verb@def f(a=1,b)@ is interpreted as \verb@def f(a=1,b=None)@.}
+{\tt def f(a=1,b)} is interpreted as {\tt def f(a=1,b=None)}.}
 \indexiii{default}{parameter}{value}
 
 Function call semantics are described in section \ref{calls}.  When a