Update Lab 1.md

adjusted section 6

LabInstructions/Lab 1.md

@@ -153,7 +153,7 @@
 
   **Part 6 (Optional) - Add XML Support**
 
-27. REST applications should return the content type requested by the clients when possible.  Spring Boot can easily support formats like XML based on dependencies (JAXB 2, Jackson) on the classpath.  Unfortunately, versions of Java after 8.x no longer include JAXB 2, so XML support requires a bit of effort on our part by adding either JAXB 2 OR Jackson dependencies.  Open your POM and add dependencies for EITHER Jackson (recommended):
+27. When possible, REST applications should return the content type requested by the client.  Spring Boot can easily support formats like XML based on dependencies (JAXB 2, Jackson) on the classpath.  Unfortunately, versions of Java after 8.x no longer automatically include JAXB 2, so XML support requires a bit of effort on our part by adding either JAXB 2 OR Jackson dependencies.  Open your POM and add dependencies for EITHER Jackson (recommended):
 
   ```
 <dependency>
@@ -162,7 +162,7 @@
 </dependency>
   ```
 
-JAXB 2:
+*OR* JAXB 2:
 
   ```
 <dependency>
@@ -198,7 +198,7 @@ spring.mvc.pathmatch.use-suffix-pattern=true
 30.  Save all work.  Restart the application.  Open [http://localhost:8080/teams/1?format=xml](http://localhost:8080/teams/1?format=xml) or [http://localhost:8080/teams/1.xml](http://localhost:8080/teams/1.xml) to see the results in XML.  Use [http://localhost:8080/teams/1?format=json](http://localhost:8080/teams/1?format=json) or [http://localhost:8080/teams/1.json](http://localhost:8080/teams/1.json) to see the results in JSON.
   - Note that not all browsers display JSON & XML nicely, consider shopping for some plugins.
   - Note that JAXB 2 will have issues with the /teams endpoint, since the type returned is not annotated with @@XmlRootElement, one of the reasons many prefer Jackson.
-  - Note that the extension basis of content negotiation (i.e. .xml, .json) has fallen out of favor recently, see [suffix-based parameter matching](https://docs.spring.io/spring/docs/current/spring-framework-reference/web.html#mvc-ann-requestmapping-suffix-pattern-match).
+  - Note that the Accept header (Accept=text/xml or Accept=application/json) can also be used to specify the desired content type - it's just a bit more work to set from the browser.  Use of an extension basis for content negotiation (i.e. .xml, .json) has fallen out of favor recently, see [suffix-based parameter matching](https://docs.spring.io/spring/docs/current/spring-framework-reference/web.html#mvc-ann-requestmapping-suffix-pattern-match).
 
   **Part 7 - Add Spring Data REST**