[groovy] 06/06: Trivial tweak for Operators documentation

[su...@apache.org]

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sunlan pushed a commit to branch GROOVY_4_0_X
in repository https://gitbox.apache.org/repos/asf/groovy.git

commit 08c01a29b64f330454c7fb81ff2759bf0eb80cdc
Author: Daniel Sun <su...@apache.org>
AuthorDate: Sat Sep 17 21:55:36 2022 +0800

    Trivial tweak for Operators documentation
    
    (cherry picked from commit 0b8f0dfd4a4d93f437a64502c7f8c44e04d5a711)
---
 src/spec/doc/core-operators.adoc   | 3 ++-
 src/spec/test/OperatorsTest.groovy | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/spec/doc/core-operators.adoc b/src/spec/doc/core-operators.adoc
index 4f8ce46b93..50dde78560 100644
--- a/src/spec/doc/core-operators.adoc
+++ b/src/spec/doc/core-operators.adoc
@@ -812,7 +812,8 @@ include::../test/OperatorsTest.groovy[tags=identity_op,indent=0]
 <1> Create a list of strings
 <2> Create another list of strings containing the same elements
 <3> using `==`, we test object equality, equivalent to `list1.equals(list2)` in Java
-<4> but using `is`, we can check that references are distinct,  equivalent to `list1 != list2` in Java
+<4> using `is`, we can check that references are distinct,  equivalent to `list1 == list2` in Java
+<5> using `===` or `!==` (supported and recommended since Groovy 3.0.0), we can also check whether references are distinct or not, equivalent to `list1 == list2` and `list1 != list2` in Java
 
 === Coercion operator
 
diff --git a/src/spec/test/OperatorsTest.groovy b/src/spec/test/OperatorsTest.groovy
index 1a87eb6e84..a37b369fd9 100644
--- a/src/spec/test/OperatorsTest.groovy
+++ b/src/spec/test/OperatorsTest.groovy
@@ -622,6 +622,7 @@ assert function(*args,5,6) == 26
         def list2 = ['Groovy 1.8','Groovy 2.0','Groovy 2.3']        // <2>
         assert list1 == list2                                       // <3>
         assert !list1.is(list2)                                     // <4>
+        assert list1 !== list2                                      // <5>
         // end::identity_op[]
     }