Log(base, x) is not correctly supported in the MathML Editor

[alexmsmartins]

If you insert log(2,x) in the MathML Editor it outputs log102 (with a subscript 10 ).
The bug is probably due to the fact that log only reads the first parameter and assumes the default base of 10 (MathML specification)

[alexmsmartins]

This will probably require using a special case for log in both MathMLPrettyPirnter and MathMLParser.
It migh even include correcting the way known MathML symbols are handled.