updated CharString semantics for Julia 0.3

[stevengj]

It seems likely that the CharString constructor will be changing in Julia 0.3 (JuliaLang/julia#7016), but it looks like there is an easy fix to make your code compatible with both Julia 0.2 and Julia 0.3. Just change:

return utf8(CharString(r[1:i]))

to use utf8(r[1:i]). The intermediate construction of a CharString is not necessary even in Julia 0.2.

[johnmyleswhite]

Thanks. Will fix now.

[johnmyleswhite]

Closed by a7e55e4