git-imap-send.txt: don't duplicate 'Examples' sections

Remove the 'Examples' subsection in the 'Configuration' section and move
these examples to the 'Examples' section. Also remove the 'Variables'
title since it is now useless.

Also, use appropriate Asciidoc syntax for configuration values, and
capitalize 'Gmail' properly.

Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-imap-send.txt

@@ -51,17 +51,13 @@ OPTIONS
 CONFIGURATION
 -------------
 
-To use the tool, imap.folder and either imap.tunnel or imap.host must be set
+To use the tool, `imap.folder` and either `imap.tunnel` or `imap.host` must be set
 to appropriate values.
 
-Variables
-~~~~~~~~~
-
 include::config/imap.txt[]
 
-Examples
-~~~~~~~~
-
+EXAMPLES
+--------
 Using tunnel mode:
 
 ..........................
@@ -93,10 +89,7 @@ Using direct mode with SSL:
 .........................
 
 
-EXAMPLES
---------
-To submit patches using GMail's IMAP interface, first, edit your ~/.gitconfig
-to specify your account settings:
+Using Gmail's IMAP interface:
 
 ---------
 [imap]
@@ -107,14 +100,14 @@ to specify your account settings:
 	sslverify = false
 ---------
 
-You might need to instead use: folder = "[Google Mail]/Drafts" if you get an error
+You might need to instead use: `folder = "[Google Mail]/Drafts"` if you get an error
 that the "Folder doesn't exist".
 
 Once the commits are ready to be sent, run the following command:
 
   $ git format-patch --cover-letter -M --stdout origin/master | git imap-send
 
-Just make sure to disable line wrapping in the email client (GMail's web
+Just make sure to disable line wrapping in the email client (Gmail's web
 interface will wrap lines no matter what, so you need to use a real
 IMAP client).