Various minor edits

Doc/lib/libsimplehttp.tex

@@ -8,19 +8,18 @@
 
 
 The \module{SimpleHTTPServer} module defines a request-handler class,
-interface compatible with \class{BaseHTTPServer.BaseHTTPRequestHandler}
-which serves files only from a base directory.
+interface-compatible with \class{BaseHTTPServer.BaseHTTPRequestHandler},
+that serves files only from a base directory.
 
 The \module{SimpleHTTPServer} module defines the following class:
 
 \begin{classdesc}{SimpleHTTPRequestHandler}{request, client_address, server}
-This class is used, to serve files from current directory and below,
+This class is used to serve files from the current directory and below,
 directly mapping the directory structure to HTTP requests.
 
-A lot of the work is done by the base class
-\class{BaseHTTPServer.BaseHTTPRequestHandler}, such as parsing the
-request.  This class implements the \function{do_GET()} and
-\function{do_HEAD()} functions.
+A lot of the work, such as parsing the request, is done by the base
+class \class{BaseHTTPServer.BaseHTTPRequestHandler}.  This class
+implements the \function{do_GET()} and \function{do_HEAD()} functions.
 \end{classdesc}
 
 The \class{SimpleHTTPRequestHandler} defines the following member
@@ -32,7 +31,7 @@ is defined in the module.
 \end{memberdesc}
 
 \begin{memberdesc}{extensions_map}
-A dictionary mapping suffixes into MIME types. Default is signified
+A dictionary mapping suffixes into MIME types. The default is signified
 by an empty string, and is considered to be \code{application/octet-stream}.
 The mapping is used case-insensitively, and so should contain only
 lower-cased keys.
@@ -43,7 +42,7 @@ The \class{SimpleHTTPRequestHandler} defines the following methods:
 \begin{methoddesc}{do_HEAD}{}
 This method serves the \code{'HEAD'} request type: it sends the
 headers it would send for the equivalent \code{GET} request. See the
-\method{do_GET()} method for more complete explanation of the possible
+\method{do_GET()} method for a more complete explanation of the possible
 headers.
 \end{methoddesc}
 
@@ -61,13 +60,15 @@ returns a \code{404} error response if the \function{listdir()} fails.
 If the request was mapped to a file, it is opened and the contents are
 returned.  Any \exception{IOError} exception in opening the requested
 file is mapped to a \code{404}, \code{'File not found'}
-error. Otherwise, the content type is guessed using the
+error. Otherwise, the content type is guessed by calling the
+\method{guess_type()} method, which in turn uses the
 \var{extensions_map} variable.
 
-A \code{'Content-type:'} with the guessed content type is output, and
-then a blank line, signifying end of headers, and then the contents of
-the file. If the file's MIME type starts with \code{text/} the file is
-opened in text mode; otherwise binary mode is used.
+A \code{'Content-type:'} header with the guessed content type is
+output, followed by a blank line signifying the end of the headers,
+and then the contents of the file are output. If the file's MIME type
+starts with \code{text/} the file is opened in text mode; otherwise
+binary mode is used.
 
 For example usage, see the implementation of the \function{test()}
 function.