git p4 doc: fix formatting

Attach example sections to previous level of indenting.

Fix a trailing ::

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-p4.txt

@@ -183,6 +183,7 @@ subsequent 'sync' operations.
 +
 This example imports a new remote "p4/proj2" into an existing
 git repository:
++
 ----
     $ git init
     $ git p4 sync --branch=refs/remotes/p4/proj2 //depot/proj2
@@ -434,6 +435,7 @@ git-p4.branchList::
 	enabled.  Each entry should be a pair of branch names separated
 	by a colon (:).  This example declares that both branchA and
 	branchB were created from main:
++
 -------------
 git config       git-p4.branchList main:branchA
 git config --add git-p4.branchList main:branchB
@@ -487,7 +489,7 @@ git-p4.skipUserNameCheck::
 	user map, 'git p4' exits.  This option can be used to force
 	submission regardless.
 
-git-p4.attemptRCSCleanup:
+git-p4.attemptRCSCleanup::
     If enabled, 'git p4 submit' will attempt to cleanup RCS keywords
     ($Header$, etc). These would otherwise cause merge conflicts and prevent
     the submit going ahead. This option should be considered experimental at