remove overwriting sigs

Author: JeffreySarnoff

src/type.jl

@@ -41,8 +41,8 @@ ReadableNumStyle{S<:Signed}(
     idigs::S, ibtwn::Char, rdigs::S=FDIGS%S, rbtwn::Char=FBTWN, fracpt::Char=FRACPOINT
     ) =
     ReadableNumStyle( idigs%Int32, rdigs%Int32, ibtwn, rbtwn, fracpt )
-ReadableNumStyle{I<:Integer}(
-    ibtwn::Char, idigs::I, rbtwn::Char=FBTWN, rdigs::I=FDIGS%I, fracpt::Char=FRACPOINT
+ReadableNumStyle{S<:Signed}(
+    ibtwn::Char, idigs::S, rbtwn::Char=FBTWN, rdigs::S=FDIGS%S, fracpt::Char=FRACPOINT
     ) =
     ReadableNumStyle(idigs, rdigs, ibtwn, rbtwn, fracpt)