improve type name for float
improve type name for float

bleis-tift/FSharp.Quotations.Compiler,colinbull/FSharp.Quotations.Compiler,colinbull/FSharp.Quotations.Compiler,pocketberserker/FSharp.Quotations.Compiler,pocketberserker/FSharp.Quotations.Compiler,bleis-tift/FSharp.Quotations.Compiler