Numbering of input cells with several commands

[olexandr-konovalov]

Presently it numbers the input cell by the number of the last output - would it be more natural to have it numbered by the first? E.g. on this picture In [4]: instead of In [6]:?

[olexandr-konovalov]

This may be actually OK - it's coherent with the behaviour of Python Jupyter notebooks. Could be said somewhere in the manual (or in one of the new coming demos) about possibility of placing several commands in one cell, and the way how numbering works in this case.