pack-protocol.txt: fix insconsistent spelling of "packfile"

diff --git a/Documentation/git-prune-packed.txt b/Documentation/git-prune-packed.txt
index 6738055bd3083825c06c82d1b7678ef453854253..9fed59a31724c4dccd7364c03c32c72d9c8d4664 100644 (file)
--- a/Documentation/git-prune-packed.txt
+++ b/Documentation/git-prune-packed.txt
@@ -1,5 +1,5 @@
 git-prune-packed(1)
-=====================
+===================
 
 NAME
 ----