Different behaviour of / depending on the letter that precedes it

[Leon-Lj]

Description

When typing / to create a fraction in mathlive the result differs depending on what comes before. All numbers will result in number/placeholder while some letter will be letter/placeholder while others will be letter * placeholder/placeholder.

For example typing r then / will result in r/placeholder while typing f then / will result in f * placeholder/placeholder.

So for example if you're to write an expression for the area of a triangle of base=b and height=h then you get different behavior depending on the order you write it in. A=hb/2 will result in A=(hb)/2, while A=bh/2 will result in A=bh*2/placeholder.

Arno wrote on Gitter

"f", "g" and "h" are considered functions which affects how they are handled. However, one could argue that the current behavior is incorrect. When trying to find an implicit argument for the numerator, functions are excluded, which is why it looks left and stops at "f", "g" or "h". This behavior is intended to deal with the case \cos 2 followed by /. In most cases you want the 2 in the numerator, but not the \cos. However, that works because \cos is a special function that can be written without parentheses around its arguments. That should not apply for "f", "g" and "h".

Note: This was just a curiosity that I found, not sure it's the most important of issues. :)

[gunnarmein-ts]

A setting to control this behavior would be very nice!