Merge branch 'bc/asciidoc'

Formatting nitpicks to help a (pickier) reimplementation of
AsciiDoc to grok our documentation.

* bc/asciidoc:
  Documentation: fix mismatched delimiters in git-imap-send
  Documentation: adjust document title underlining

Documentation/git-imap-send.txt

@@ -97,7 +97,7 @@ Using direct mode:
     host = imap://imap.example.com
     user = bob
     pass = p4ssw0rd
-..........................
+.........................
 
 Using direct mode with SSL:
 
@@ -109,7 +109,7 @@ Using direct mode with SSL:
     pass = p4ssw0rd
     port = 123
     sslverify = false
-..........................
+.........................
 
 
 EXAMPLE

Documentation/git-prune-packed.txt

 git-prune-packed(1)
-=====================
+===================
 
 NAME
 ----

Documentation/git-quiltimport.txt

 git-quiltimport(1)
-================
+==================
 
 NAME
 ----

Documentation/git-stage.txt

 git-stage(1)
-==============
+============
 
 NAME
 ----