Fix Documentation typos surrounding the word 'handful'.

Some instances replaced by "handful of", others use
the word "few", a couple get a slight rewording.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-ls-tree.txt b/Documentation/git-ls-tree.txt
index 4c7262f..7bf76c9 100644
--- a/Documentation/git-ls-tree.txt
+++ b/Documentation/git-ls-tree.txt
@@ -59,7 +59,7 @@
 
 --abbrev[=<n>]::
 	Instead of showing the full 40-byte hexadecimal object
-	lines, show only handful hexdigits prefix.
+	lines, show only a partial prefix.
 	Non default number of digits can be specified with --abbrev=<n>.
 
 --full-name::