Remove duplicate content (#28)

and cleanup language

src/site/apt/index.apt.vm

@@ -25,22 +25,15 @@
 
 ${project.name}
 
-  The Toolchains Plugins enables sharing configuration about tools across plugins,
-  for example to make sure the plugins like compiler, surefire, javadoc, webstart etc. all use the same JDK for execution independently from JRE used to run Maven itself.
-
-  Similarly to the maven-enforcer-plugin, it allows you to control environmental constraints in the build.
-
-* Discovery mechanism
-
-  Since version 3.2.0, a new toolchains mechanism is provided.  This relies on an automatic discovery mechanism based
-  on an internal heuristic which tries to detect JDK from known locations.  This mechanism is to be used with the
-  <<<select-jdk-toolchain>>> goal, read about the {{{./toolchains/discovery.html}discovery mechanism}} for more
-  informations.
+  The Toolchains Plugins enables sharing tool configuration across plugins;
+  for example, to make sure that plugins like compiler, surefire, and javadoc all use the same JDK for
+  execution, independently from JRE used to run Maven itself.
 
 * Goals Overview
 
   Since version 3.2.0, a new toolchains mechanism is provided.  This relies on an automatic discovery mechanism based
-  on an internal heuristic which tries to detect JDK from known locations.  This mechanism is to be used with the goal:
+  on an internal heuristic which tries to detect JDK from known locations. Read about the {{{./toolchains/discovery.html}discovery mechanism}} for more
+  information. This mechanism is to be used with the goal:
 
     * {{{./toolchain-mojo.html}toolchains:select-jdk-toolchain}} discover and selects a matching toolchain.
 
@@ -63,10 +56,10 @@ ${project.name}
   already contain the answer to your question as part of an older thread. Hence, it is also worth browsing/searching
   the {{{./mailing-lists.html}mail archive}}.
 
-  If you feel like the plugin is missing a feature or has a defect, you can file a feature request or bug report in our
+  If the plugin is missing a feature or has a defect, you can file a feature request or bug report in our
   {{{./issue-management.html}issue tracker}}. When creating a new issue, please provide a comprehensive description of your
   concern. Especially for fixing bugs it is crucial that the developers can reproduce your problem. For this reason,
-  entire debug logs, POMs or most preferably little demo projects attached to the issue are very much appreciated.
+  entire debug logs, POMs, or most preferably little demo projects attached to the issue are very much appreciated.
   Of course, patches are welcome, too. Contributors can check out the project from our
   {{{./scm.html}source repository}} and will find supplementary information in the
   {{{https://maven.apache.org/guides/development/guide-helping.html}guide to helping with Maven}}.