[tig] how to format main view

From: bill lam <cbill.lam@gmail.com>
Date: Feb 23, 2009, 05:35 UTC
Message-ID: <20090223053522.GA7435@b2j>

In the main viewi, it default to show date and author but not sha1. How to set it to format as in

git log --graph --pretty=tformat:'%h %s' --decorate

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gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3
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