LA: fix bug in Complex and Complex32 SparseMatrix.ToTypeString #347

The Complex and Complex32 implementation of SparseMatrix.ToTypeString
was reporting a filling percentage that was too large by a factor of 100
because the conversion to percentage was done twice (once by `P2` string
format)

src/Numerics/LinearAlgebra/Complex/SparseMatrix.cs

@@ -1494,7 +1494,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
 
         public override string ToTypeString()
         {
-            return string.Format("SparseMatrix {0}x{1}-Complex {2:P2} Filled", RowCount, ColumnCount, 100d * NonZerosCount / (RowCount * (double)ColumnCount));
+            return string.Format("SparseMatrix {0}x{1}-Complex {2:P2} Filled", RowCount, ColumnCount, NonZerosCount / (RowCount * (double)ColumnCount));
         }
     }
  }

src/Numerics/LinearAlgebra/Complex32/SparseMatrix.cs

@@ -1488,7 +1488,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
 
         public override string ToTypeString()
         {
-            return string.Format("SparseMatrix {0}x{1}-Complex32 {2:P2} Filled", RowCount, ColumnCount, 100d * NonZerosCount / (RowCount * (double)ColumnCount));
+            return string.Format("SparseMatrix {0}x{1}-Complex32 {2:P2} Filled", RowCount, ColumnCount, NonZerosCount / (RowCount * (double)ColumnCount));
         }
     }
 }