Expand largeSerialFormat benchmark parameters and update character tokens in format definition

Author: DmitryNekrasov

benchmarks/src/jmh/kotlin/ParserStructureConcatBenchmark.kt

@@ -21,25 +21,24 @@ import java.util.concurrent.*
 @Fork(1)
 open class ParserStructureConcatBenchmark {
 
-    @Param("1", "2", "4", "8", "16")
+    @Param("1", "2", "4", "8", "16", "32", "64", "128", "256", "512", "1024")
     var n = 0
 
     @Benchmark
     fun largeSerialFormat(blackhole: Blackhole) {
         val format = LocalDateTime.Format {
             repeat(n) {
-                year()
-                char('-')
+                char('^')
                 monthNumber()
-                char('-')
+                char('&')
                 day()
-                char(' ')
+                char('!')
                 hour()
-                char(':')
+                char('$')
                 minute()
-                char(':')
+                char('#')
                 second()
-                char('_')
+                char('@')
             }
         }
         blackhole.consume(format)