DoubleParser.canParse crashed by single comma value.

[is]

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -1
	at java.base/java.lang.StringLatin1.charAt(StringLatin1.java:48)
	at java.base/java.lang.String.charAt(String.java:1512)
	at tech.tablesaw.columns.numbers.DoubleParser.isPercent(DoubleParser.java:60)
	at tech.tablesaw.columns.numbers.DoubleParser.canParse(DoubleParser.java:29)
	at tech.tablesaw.io.ColumnTypeDetector.detectType(ColumnTypeDetector.java:155)
	at tech.tablesaw.io.ColumnTypeDetector.detectColumnTypes(ColumnTypeDetector.java:100)
	at tech.tablesaw.io.FileReader.getColumnTypes(FileReader.java:58)
	at tech.tablesaw.io.csv.CsvReader.detectColumnTypes(CsvReader.java:156)
	at tech.tablesaw.io.csv.CsvReader.getReaderAndColumnTypes(CsvReader.java:75)
	at tech.tablesaw.io.csv.CsvReader.read(CsvReader.java:92)
	at tech.tablesaw.io.csv.CsvReader.read(CsvReader.java:87)
	at tech.tablesaw.io.csv.CsvReader.read(CsvReader.java:34)
	at tech.tablesaw.io.DataFrameReader.usingOptions(DataFrameReader.java:139)

The csv file

token,title,event,context,advice,total
",",11427,587954,152285,360184,1111850
the,2850,450041,172617,372166,997674
.,612,406092,112307,349705,868716
be,859,315897,99111,272848,688715
and,7132,303502,90898,282893,684425

When cheked string is ",", it will be stripped to an empty string, but the followed catch statement do not catch StringIndexOutOfBoundsException exception.

[lwhite1]

fixed in #1044