Addressed latest comments

core/src/test/scala/org/apache/spark/util/UtilsSuite.scala

@@ -1148,16 +1148,16 @@ class UtilsSuite extends SparkFunSuite with ResetSystemProperties with Logging {
 
   test("check Kubernetes master URL") {
     val k8sMasterURLHttps = Utils.checkAndGetK8sMasterUrl("k8s://https://host:port")
-    assert(k8sMasterURLHttps == "k8s:https://host:port")
+    assert(k8sMasterURLHttps === "k8s:https://host:port")
 
     val k8sMasterURLHttp = Utils.checkAndGetK8sMasterUrl("k8s://http://host:port")
-    assert(k8sMasterURLHttp == "k8s:http://host:port")
+    assert(k8sMasterURLHttp === "k8s:http://host:port")
 
     val k8sMasterURLWithoutScheme = Utils.checkAndGetK8sMasterUrl("k8s://127.0.0.1:8443")
-    assert(k8sMasterURLWithoutScheme == "k8s:https://127.0.0.1:8443")
+    assert(k8sMasterURLWithoutScheme === "k8s:https://127.0.0.1:8443")
 
     val k8sMasterURLWithoutScheme2 = Utils.checkAndGetK8sMasterUrl("k8s://127.0.0.1")
-    assert(k8sMasterURLWithoutScheme2 == "k8s:https://127.0.0.1")
+    assert(k8sMasterURLWithoutScheme2 === "k8s:https://127.0.0.1")
 
     intercept[IllegalArgumentException] {
       Utils.checkAndGetK8sMasterUrl("k8s:https://host:port")

docs/configuration.md

@@ -163,8 +163,8 @@ of the most common options to set are:
   <td>
     The amount of off-heap memory (in megabytes) to be allocated per driver in cluster mode. This is
     memory that accounts for things like VM overheads, interned strings, other native overheads, etc.
-    This tends to grow with the container size (typically 6-10%). This option is supported in Yarn
-    mode and Kubernetes mode.
+    This tends to grow with the container size (typically 6-10%). This option is currently supported
+    on YARN and Kubernetes.
   </td>
 </tr>
 <tr>
@@ -180,8 +180,8 @@ of the most common options to set are:
   <td>
     The amount of off-heap memory (in megabytes) to be allocated per executor. This is memory that
     accounts for things like VM overheads, interned strings, other native overheads, etc. This tends
-    to grow with the executor size (typically 6-10%). This option is supported in Yarn mode and
-    Kubernetes mode.
+    to grow with the executor size (typically 6-10%). This option is currently supported on YARN and
+    Kubernetes.
   </td>
 </tr>
 <tr>