fixed quote escape detection issue reported in #444

src/main/java/com/univocity/parsers/csv/CsvFormatDetector.java

@@ -128,7 +128,7 @@ public void execute(char[] characters, int length) {
 
 					if (i + 1 < length) {
 						char next = characters[i + 1];
-						if (Character.isLetterOrDigit(next) || (next <= ' ' && whitespaceRangeStart < next && next != '\n' && next != '\r')) { //no special characters after quote, might be escaping
+						if (Character.isLetterOrDigit(next) || (next <= ' ' && whitespaceRangeStart < next && next != '\n' && next != '\r' && next != '\t')) { //no special characters after quote, might be escaping
 							//special character before (potentially) closing quote, might be an escape
 							char prev = characters[i - 1];
 							if (!Character.isLetterOrDigit(prev) && prev != '\n' && prev != '\r') {
@@ -260,7 +260,7 @@ public void execute(char[] characters, int length) {
 		}
 
 		escape.remove(delimiter);
-		char quoteEscape = doubleQuoteCount == 0 && singleQuoteCount == 0 ? suggestedQuoteEscape : max(escape, totals, quote);
+		char quoteEscape =doubleQuoteCount == 0 && singleQuoteCount == 0 ? suggestedQuoteEscape : max(escape, totals, quote);
 		apply(delimiter, quote, quoteEscape);
 	}
 

src/test/java/com/univocity/parsers/issues/github/Github_444.java

@@ -0,0 +1,43 @@
+package com.univocity.parsers.issues.github;
+
+import com.univocity.parsers.csv.*;
+import org.testng.annotations.*;
+
+import java.io.*;
+import java.util.*;
+
+import static org.testng.Assert.*;
+
+
+/**
+ * From: https://github.com/univocity/univocity-parsers/issues/444
+ *
+ * @author Univocity Software Pty Ltd - <a href="mailto:[email protected]">[email protected]</a>
+ */
+public class Github_444 {
+
+	@Test
+	public void parseCSV() {
+		String rawData;
+		rawData = "" +
+				"\"\"\"quoted\"\"\n" +
+				")\"\t\n";
+
+		final CsvParserSettings settings = new CsvParserSettings();
+		settings.detectFormatAutomatically('\t', ';', ',');
+		settings.setIgnoreLeadingWhitespaces(false);
+		settings.setIgnoreTrailingWhitespaces(false);
+		settings.setSkipEmptyLines(false);
+
+		settings.setNullValue("");
+
+
+		final CsvParser parser = new CsvParser(settings);
+
+		String[] row = parser.parseAll(new StringReader(rawData)).get(0);
+		assertEquals(row[0], "\"quoted\"\n)");
+		assertEquals(row[1], "");
+
+		assertEquals(parser.getDetectedFormat().getQuoteEscape(), '"');
+	}
+}