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detect if line has only white space?

From: Miguel Frasson
Subject: detect if line has only white space?
Date: 10 Nov 2003 18:42:56 +0100
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2


I would like to have a elisp function that detects if the current line
contains only white space. Some idea? 

Aditionally, I would like to remove all space at the end of the
lines at once (e-lisp code). How?

Many thanks.


Miguel Vinicius Santini Frasson

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