diff --git a/plus/src/main/java/org/apache/calcite/adapter/os/PsTableFunction.java b/plus/src/main/java/org/apache/calcite/adapter/os/PsTableFunction.java
index 1f81f69ac447..36980044de01 100644
--- a/plus/src/main/java/org/apache/calcite/adapter/os/PsTableFunction.java
+++ b/plus/src/main/java/org/apache/calcite/adapter/os/PsTableFunction.java
@@ -135,7 +135,6 @@ protected static class LineParser implements Function1<String, Object[]> {
       } else {
         values[fieldIdx] = field(PS_FIELD_NAMES.get(fieldIdx), tokens[processedTokens]);
       }
-
       return values;
     }
 
diff --git a/plus/src/test/java/org/apache/calcite/adapter/os/PsTableFunctionTest.java b/plus/src/test/java/org/apache/calcite/adapter/os/PsTableFunctionTest.java
index 844db39736d4..181cb5655bd9 100644
--- a/plus/src/test/java/org/apache/calcite/adapter/os/PsTableFunctionTest.java
+++ b/plus/src/test/java/org/apache/calcite/adapter/os/PsTableFunctionTest.java
@@ -34,6 +34,10 @@
  */
 class PsTableFunctionTest {
 
+  /** Test case for
+   * <a href="https://issues.apache.org/jira/browse/CALCITE-6388">[CALCITE-6388]
+   * PsTableFunction throws NumberFormatException when the 'user' column has spaces</a>.
+   */
   @Test void testPsInfoParsing() {
     final List<String> input = new ArrayList<>();
     input.add("startup user     56399     1 56399    0 S      0.0  0.0 410348128   6672 ??"