`parse` does not preserve multiplication symbol

[schillic]

From the documentation:

julia> parse_sxmath("x' == x & v' == -0.75*v")
2-element Array{Expr,1}:
 :(x' = x)
 :(v' = -0.75v)

Assume that the variable is called e1. You get :(v' = -0.75e1), which is then interpreted as -7.5 in later stages.

The problem is with the parse call in the last line:

julia> parse("v' == -0.75*v")
:(v' == -0.75v)

This occurs in the Platooning model.

[mforets]

FWIW, SymEngine's convert gets it right:

julia> using SymEngine

julia> expr = convert(Basic, "4.5*e1")
4.5*e1

julia> SymEngine.free_symbols(expr)
1-element Array{SymEngine.Basic,1}:
 e1