NO-JIRA fix few typos and a docstring

artemis-core-client/src/main/java/org/apache/activemq/artemis/api/core/Message.java

@@ -70,7 +70,7 @@ import org.apache.activemq.artemis.core.persistence.Persister;
  */
 public interface Message {
 
-   // This is an estimate of how much memory a Message takes up, exclusing body and properties
+   // This is an estimate of how much memory a Message takes up, excluding body and properties
    // Note, it is only an estimate, it's not possible to be entirely sure with Java
    // This figure is calculated using the test utilities in org.apache.activemq.tests.unit.util.sizeof
    // The value is somewhat higher on 64 bit architectures, probably due to different alignment

docs/hacking-guide/en/code.md

@@ -37,7 +37,7 @@ related JIRA or an email to the [dev list](http://activemq.apache.org/mailing-li
 
 1. Build with Maven
 
-   Typically developers will want to build using the `dev` profile which disables license and code style checks. For
+   Typically developers will want to build using the `dev` profile which enables license and code style checks. For
    example:
    
         $ mvn -Pdev install

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/client/SlowConsumerTest.java

@@ -362,9 +362,9 @@ public class SlowConsumerTest extends ActiveMQTestBase {
     * messages at a rate of 2 messages per second. Each consumer
     * consumes messages at rate of 1 message per second. The slow
     * consumer threshold is 1 message per second.
-    * Based on the above settings, at least one of the consumers
-    * will be removed during the test, but at least one of the
-    * consumers will remain and all messages will be received.
+    * Based on the above settings, slow consumer removal will not
+    * be performed (2 < 3*1), so no consumer will be removed during the
+    * test, and all messages will be received.
     */
    @Test
    public void testMultipleConsumersOneQueue() throws Exception {