TypeError: collect: in typeassert, expected SubString{SubString{String}}, got SubString{String}

[altre]

I get a type error when combining TokenMax with qgram measures in some cases:
`julia> StringDistances.compare(TokenMax(Jaccard(2)), "aa", "aa ")

ERROR: TypeError: collect: in typeassert, expected SubString{SubString{String}}, got SubString{String}
Stacktrace:
[1] collect(::StringDistances.QGramIterator{SubString{String},Int64}) at /Users/alanschelten/.julia/v0.6/StringDistances/src/distances/qgram.jl:33
[2] sort at /Users/alanschelten/.julia/v0.6/StringDistances/src/distances/qgram.jl:37 [inlined]
[3] evaluate(::StringDistances.Jaccard{Int64}, ::String, ::SubString{String}) at /Users/alanschelten/.julia/v0.6/StringDistances/src/distances/qgram.jl:85
[4] compare(::StringDistances.Jaccard{Int64}, ::String, ::SubString{String}) at /Users/alanschelten/.julia/v0.6/StringDistances/src/compare.jl:23
[5] compare(::StringDistances.Partial{StringDistances.Jaccard{Int64}}, ::String, ::String) at /Users/alanschelten/.julia/v0.6/StringDistances/src/modifiers/fuzzywuzzy.jl:19
[6] compare(::StringDistances.TokenMax{StringDistances.Jaccard{Int64}}, ::String, ::String) at /Users/alanschelten/.julia/v0.6/StringDistances/src/modifiers/fuzzywuzzy.jl:138`

[matthieugomez]

Thanks! Also I realized there was a bug in compare for QGram. Solved by cb5e1a3