gitview.txt: improve asciidoc markup

Signed-off-by: NJonas Fonseca <fonseca@diku.dk>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

contrib/gitview/gitview.txt

@@ -7,40 +7,50 @@ gitview - A GTK based repository browser for git
 
 SYNOPSIS
 --------
-'gitview'  [options] [args]
+'gitview' [options] [args]
 
 DESCRIPTION
 ---------
 
-Dependencies
+Dependencies:
 
 * Python 2.4
 * PyGTK 2.8 or later
 * PyCairo 1.0 or later
 
 OPTIONS
-------
-	--without-diff
-		If the user doesn't want to list the commit diffs in the main window. This may speed up the repository browsing.
-
-	<args>
-		All the valid option for git-rev-list(1)
-	Key Bindings:
-	F4:
-		To maximize the window
-	F5:
-		To reread references.
-	F11:
-		Full screen
-	F12:
-		Leave full screen
+-------
+--without-diff::
+
+	If the user doesn't want to list the commit diffs in the main window.
+	This may speed up the repository browsing.
+
+<args>::
+
+	All the valid option for gitlink:git-rev-list[1].
+
+Key Bindings
+------------
+F4::
+	To maximize the window
+
+F5::
+	To reread references.
+
+F11::
+	Full screen
+
+F12::
+	Leave full screen
 
 EXAMPLES
-------
-	gitview v2.6.12.. include/scsi drivers/scsi
-	  Show as the changes since version v2.6.12 that changed any file in the include/scsi
-	  or drivers/scsi subdirectories
+--------
+
+gitview v2.6.12.. include/scsi drivers/scsi::
+
+	Show as the changes since version v2.6.12 that changed any file in the
+	include/scsi or drivers/scsi subdirectories
 
-	gitview --since=2.weeks.ago
-	  Show the changes during the last two weeks
+gitview --since=2.weeks.ago::
 
+	Show the changes during the last two weeks