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Date: Tue, 6 Oct 2009 23:45:36 -0700
Message-ID: <2daa8b4e0910062345r83fa23aj113b062af114887f@mail.gmail.com>
From: David Allen <the.real.david.allen@gmail.com>
To: freebsd-questions@freebsd.org
Content-Type: text/plain; charset=ISO-8859-1
Subject: A general sed question
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I keep bumping up against this, so I thought I'd throw this question out
to those who understand sed better than I do.

What I'm trying to do is to clean up the contents of some files
(/sys/i386/conf/GENERIC would be a good example) to get more readable
diffs.  To that end, I'm trying to use sed to

 - delete commented lines
 - remove inline comments
 - remove trailing spaces and/or tabs
 - delete blank lines, and/or lines containing just spaces and/or tabs
 - expand tabs

Thanks!