Added documentation for few missing options.

More $ shell prompts in examples.
Minor English grammar improvements.
Added a few "See Also"s.
Use back-ticks on more command examples.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/Documentation/git-write-tree.txt b/Documentation/git-write-tree.txt
index abee05f..77e12cb 100644
--- a/Documentation/git-write-tree.txt
+++ b/Documentation/git-write-tree.txt
@@ -14,19 +14,21 @@
 -----------
 Creates a tree object using the current index.
 
-The index must be merged.
+The index must be in a fully merged state.
 
-Conceptually, "git-write-tree" sync()s the current index contents
+Conceptually, `git-write-tree` sync()s the current index contents
 into a set of tree files.
 In order to have that match what is actually in your directory right
-now, you need to have done a "git-update-index" phase before you did the
-"git-write-tree".
+now, you need to have done a `git-update-index` phase before you did the
+`git-write-tree`.
+
 
 OPTIONS
 -------
 --missing-ok::
-	Normally "git-write-tree" ensures that the objects referenced by the
-	directory exist in the object database.  This option disables this check.
+	Normally `git-write-tree` ensures that the objects referenced by the
+	directory exist in the object database.  This option disables this
+	check.
 
 Author
 ------