Update default_build_script.adoc

Escaped the asterisk at end of document to allow it to be a notation from *-impl.xml.

src/docs/asciidoc/sdk/default_build_script.adoc

@@ -63,7 +63,7 @@ The build script is a non-proprietary Apache Ant script. It will work out-of-the
 
 Read the comments in `build.xml`, they explain how to override targets, or extend them, to customize the build process without breaking the existing functionality.
 
-Additionally, you can manually override the targets in the `-**impl.xml**` files that are created when you change the deployment settings:
+Additionally, you can manually override the targets in the `*-impl.xml` files that are created when you change the deployment settings:
 
 *  linuxlauncher-impl.xml,
 *  macapp-impl.xml, 
@@ -72,4 +72,4 @@ Additionally, you can manually override the targets in the `-**impl.xml**` files
 
 Simply copy&paste a target from these files into the main build.xml and that will be run instead with all modifications.
 
-Don't edit the base `-**impl.xml**` files directly, if you deactivate and reactivate a deployment setting, the SDK resets these files, so you have to copy the whole target and its dependencies, else your build script will become invalid when you disable the deployment option.
+\* Don't edit the base `-impl.xml` files directly, if you deactivate and reactivate a deployment setting, the SDK resets these files, so you have to copy the whole target and its dependencies, else your build script will become invalid when you disable the deployment option.