Find if the cell value starts with single quote mark

Aspose.Cells for Python via .NET now provides the Style.quote_prefix property to find if the cell value starts with a single quote mark. Before this property, there was no way to distinguish between strings like sample and 'sample', etc.

The following sample code demonstrates that strings such as sample and 'sample' cannot be differentiated using the Cell.string_value property. Therefore, we must use the Style.quote_prefix property to distinguish them.