Minor grammar and typo fixes

Doc/lib/email.tex

@@ -26,7 +26,7 @@ using the \module{email} package deal primarily with objects; you can
 add sub-objects to messages, remove sub-objects from messages,
 completely re-arrange the contents, etc.  There is a separate parser
 and a separate generator which handles the transformation from flat
-text to the object module, and then back to flat text again.  There
+text to the object model, and then back to flat text again.  There
 are also handy subclasses for some common MIME object types, and a few
 miscellaneous utilities that help with such common tasks as extracting
 and parsing message field values, creating RFC-compliant dates, etc.
@@ -48,7 +48,7 @@ modules that the \module{email} package provides, the exception
 classes you might encounter while using the \module{email} package,
 some auxiliary utilities, and a few examples.  For users of the older
 \module{mimelib} package, from which the \module{email} package is
-descendent, a section on differences and porting is provided.
+descended, a section on differences and porting is provided.
 
 \subsection{Representing an email message}
 \input{emailmessage}

Doc/lib/emailgenerator.tex

@@ -15,7 +15,7 @@ generate most email in a standards-compliant way, should handle MIME
 and non-MIME email messages just fine, and is designed so that the
 transformation from flat text, to an object tree via the
 \class{Parser} class,
-and back to flat text, be idempotent (the input is identical to the
+and back to flat text, is idempotent (the input is identical to the
 output).
 
 Here are the public methods of the \class{Generator} class:
@@ -27,7 +27,7 @@ object called \var{outfp} for an argument.  \var{outfp} must support
 the \method{write()} method and be usable as the output file in a
 Python 2.0 extended print statement.
 
-Optional \var{mangle_from_} is a flag that, when true, puts a ``>''
+Optional \var{mangle_from_} is a flag that, when true, puts a \samp{>}
 character in front of any line in the body that starts exactly as
 \samp{From } (i.e. \code{From} followed by a space at the front of the
 line).  This is the only guaranteed portable way to avoid having such

Doc/lib/emailmessage.tex

@@ -132,7 +132,7 @@ Return the total number of headers, including duplicates.
 
 \begin{methoddesc}[Message]{__contains__}{name}
 Return true if the message object has a field named \var{name}.
-Match is done case-insensitively and \var{name} should not include the
+Matching is done case-insensitively and \var{name} should not include the
 trailing colon.  Used for the \code{in} operator,
 e.g.:
 

Doc/lib/emailutil.tex

@@ -101,7 +101,7 @@ timestamp.  It the timezone item in the tuple is \code{None}, assume
 local time.  Minor deficiency: \function{mktime_tz()} interprets the
 first 8 elements of \var{tuple} as a local time and then compensates
 for the timezone difference.  This may yield a slight error around
-changes in daylight savings time, though not worth worring about for
+changes in daylight savings time, though not worth worrying about for
 common use.
 \end{funcdesc}