doc: revisions: sort examples and fix alignment of the unchanged

The previous commit adjusted the column alignment for revision
examples which show expansion. Fix the unchanged examples and sort
those that show expansions to the end of the list.

Signed-off-by: Philip Oakley <philipoakley@iee.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/revisions.txt

@@ -330,14 +330,14 @@ with each step in the notation's expansion and selection carefully
 spelt out:
 
    Args   Expanded arguments    Selected commits
-   D                G H D
-   D F              G H I J D F
-   ^G D             H D
-   ^D B             E I J F B
+   D                            G H D
+   D F                          G H I J D F
+   ^G D                         H D
+   ^D B                         E I J F B
+   ^D B C                       E I J F B C
+   C                            I J F C
    B..C   = ^B C                C
    B...C  = B ^F C              G H D E B C
-   ^D B C           E I J F B C
-   C                I J F C
    C^@    = C^1
 	  = F                   I J F
    B^@    = B^1 B^2 B^3