#65 doc: "A = ( 0*tensor::i + yscale( tensor::j ) + 0*tensor::k )" trick

[Sylwester Arabas]

As pointed out in this thread:
https://sourceforge.net/p/blitz/mailman/message/32742056/

mixing arrays of different dimensionality in the example expression requires a trick employing placeholders like "0*tensor::i" etc - perhaps worth documenting.

S.

[Sylwester Arabas]

moved here: https://github.com/blitzpp/blitz/issues/75