[CSV-279] Optimize Lexer Delimiter Check for One Character Delimiter

apache#163.

Author: garydgregory

src/changes/changes.xml

@@ -65,6 +65,7 @@
       <action issue="CSV-281" type="fix" dev="ggregory" due-to="belugabehr">Update CSVBenchmark #165.</action>
       <action issue="CSV-283" type="fix" dev="ggregory" due-to="belugabehr">Remove Whitespace Check Determines Delimiter Twice #167.</action>
       <action issue="CSV-283" type="fix" dev="ggregory" due-to="belugabehr">Document and Automate CSV Benchmark Harness #166.</action>
+      <action issue="CSV-279" type="fix" dev="ggregory" due-to="belugabehr">Optimize Lexer Delimiter Check for One Character Delimiter #163.</action>
       <!-- ADD -->
       <action issue="CSV-275" type="add" dev="ggregory" due-to="Michael Wyraz, Gary Gregory">Make CSVRecord#toList() public.</action>
       <action                 type="add" dev="ggregory" due-to="Gary Gregory">Add CSVRecord#stream().</action>