Deriving natures from disciplines examples

Hi

Tiny bug report. In 3.6.2.6 Deriving natures from disciplines, the
examples refer to the 3.6.2.5 examples. However, the disciplines in
3.6.2.5 all start with lower case letters (like "ttl"), and when they
are referred to in 3.6.2.6, they begin with upper case (like "Ttl").

Regards
Paul Floyd

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Dr Paul Floyd
Mentor Graphics Corporation
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