Remove trailing spaces from the design-doc-template.

design-doc-template.adoc

@@ -42,7 +42,7 @@ categories:
 === QE Contacts
 
 === Testing By
-// Put an x in the relevant field to indicate if testing will be done by Engineering or QE. 
+// Put an x in the relevant field to indicate if testing will be done by Engineering or QE.
 // Discuss with QE during the Kickoff state to decide this
 * [ ] Engineering
 
@@ -97,9 +97,9 @@ categories:
 
 //== Implementation Plan
 ////
-Delete if not needed. The intent is if you have a complex feature which can 
-not be delivered all in one go to suggest the strategy. If your feature falls 
-into this category, please mention the Release Coordinators on the pull 
+Delete if not needed. The intent is if you have a complex feature which can
+not be delivered all in one go to suggest the strategy. If your feature falls
+into this category, please mention the Release Coordinators on the pull
 request so they are aware.
 ////
 
@@ -129,10 +129,10 @@ Generally a feature should have documentation as part of the PR to wildfly main,
 == Release Note Content
 ////
 Draft verbiage for up to a few sentences on the feature for inclusion in the
-Release Note blog article for the release that first includes this feature. 
+Release Note blog article for the release that first includes this feature.
 Example article: http://wildfly.org/news/2018/08/30/WildFly14-Final-Released/.
 This content will be edited, so there is no need to make it perfect or discuss
 what release it appears in.  "See Overview" is acceptable if the overview is
-suitable. For simple features best covered as an item in a bullet-point list 
-of features containing a few words on each, use "Bullet point: <The few words>" 
+suitable. For simple features best covered as an item in a bullet-point list
+of features containing a few words on each, use "Bullet point: <The few words>"
 ////