I notice in Interface3.pdf that the heading above the paragraph 
explaining \tl_if_eq_p:NN etc. uses {<tl var1>}{<tl var2>} with braces 
around the tl vars, and for the next item, \tl_if_eq:nnTF, the first 
<token list> is without braces.

Also in the section on comma lists, \clist_pop:NNTF uses <sequence> 
rather than <comma list>.

Andrew

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