Improve description and markup; comment out empty sections.

--HG--
branch : HEAD
diff --git a/man/zip_open.mdoc b/man/zip_open.mdoc
index dce0654..1c896cb 100644
--- a/man/zip_open.mdoc
+++ b/man/zip_open.mdoc
@@ -1,4 +1,4 @@
-.\" $NiH: zip_open.mdoc,v 1.2 2003/10/02 14:13:34 dillo Exp $
+.\" $NiH: zip_open.mdoc,v 1.3 2003/10/02 14:20:52 dillo Exp $
 .\"
 .\" zip_open.mdoc -- open zip archive
 .\" Copyright (C) 2003 Dieter Baron and Thomas Klausner
@@ -18,7 +18,7 @@
 .\" 3. The names of the authors may not be used to endorse or promote
 .\"    products derived from this software without specific prior
 .\"    written permission.
-.\" 
+.\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
 .\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -40,14 +40,20 @@
 .Sh LIBRARY
 .Lb libzip
 .Sh SYNOPSIS
-.Fd #include \*[Lt]zip.h\*[Gt]
+.In zip.h
 .Ft struct zip *
 .Fn zip_open "const char *path" "int flags"
 .Sh DESCRIPTION
+.Fn zip_open
+opens the zip file
+.Ar path
+and returns a
+.Ft struct zip
+for further use by the library.
 The
 .Fa flags
 are specified by
-.Em or Ns 'ing
+.Em or Ns No 'ing
 the following values, or 0 for none of them.
 .Bl -tag -offset indent -width ZIP_CHECKCONS
 .It Dv ZIP_CREATE
@@ -62,14 +68,14 @@
 Upon successful completion
 .Fn zip_open
 returns a
-.Tn struct zip
+.Ft struct zip
 pointer.
 Otherwise,
 .Dv NULL
 is returned and the global variable
 .Va zip_err
 is set to indicate the error.
-.Sh ERRORS
+.\".Sh ERRORS
 .\" XXX
-.Sh SEE ALSO
+.\".Sh SEE ALSO
 .\" XXX