Update NCIdlCompilerBase.scala
diff --git a/nlpcraft/src/main/scala/org/apache/nlpcraft/model/intent/compiler/NCIdlCompilerBase.scala b/nlpcraft/src/main/scala/org/apache/nlpcraft/model/intent/compiler/NCIdlCompilerBase.scala
index 8359ab1..21ce034 100644
--- a/nlpcraft/src/main/scala/org/apache/nlpcraft/model/intent/compiler/NCIdlCompilerBase.scala
+++ b/nlpcraft/src/main/scala/org/apache/nlpcraft/model/intent/compiler/NCIdlCompilerBase.scala
@@ -765,7 +765,7 @@
                         val seq: Seq[Double] = lst.asScala.map(p ⇒ JDouble.valueOf(p.toString).doubleValue())
 
                         val mean = seq.sum / seq.length
-                        val stdDev = Math.sqrt(seq.map( _ - mean).map(t ⇒ t * t).sum /seq.length)
+                        val stdDev = Math.sqrt(seq.map( _ - mean).map(t ⇒ t * t).sum / seq.length)
 
                         Z(stdDev, n)
                     }