glossary: fix and clarify the definition of 'ref'

diff --git a/Documentation/git-cat-file.txt b/Documentation/git-cat-file.txt
index 10fbc6a373758437f23ef80245b3bd9e164add1f..e468cebf3193591430484e28f56225c158385592 100644 (file)
--- a/Documentation/git-cat-file.txt
+++ b/Documentation/git-cat-file.txt
@@ -54,7 +54,7 @@ OPTIONS
 
 --textconv::
        Show the content as transformed by a textconv filter. In this case,
-       <object> has be of the form <treeish>:<path>, or :<path> in order
+       <object> has be of the form <tree-ish>:<path>, or :<path> in order
        to apply the filter to the content recorded in the index at <path>.
 
 --batch::