Fixed a bug where ScanName() would not correctly identify the BeginDi…

…ctionary delimiter if the next char was a '.'

src/PdfSharp/Pdf.IO/Lexer.cs

@@ -348,7 +348,7 @@ public Symbol ScanName()
 						return _symbol = Symbol.Name;
 					case '[':
 						//TODO: Not Complete
-						if (IsWhiteSpace(_nextChar) || IsDelimiter(_nextChar) || char.IsNumber(_nextChar) || _nextChar == '-' || PeekArrayKeyword())
+						if (IsWhiteSpace(_nextChar) || IsDelimiter(_nextChar) || char.IsNumber(_nextChar) || _nextChar == '.' || _nextChar == '-' || PeekArrayKeyword())
 						{
 							return _symbol = Symbol.Name;
 						}