doc: RCU: Avoid 'Symbol' font-family in SVG figures
On Ubuntu Focal, strings in some of SVG files under Documentation/RCU/Design can not be rendered properly when converted to PDF. Ubuntu releases since Focal and Debian bullseye have trouble with "Symbol" font-family in SVG files. As those strings are mostly API names such as "READ_ONCE()", "WRITE_ONCE(), "rcu_read_lock()", and so on, using a generic monospace font-family should be a good alternative. Substitute the font-family name by a simple sed pattern: 's/Symbol/monospace/g' Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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