docs: studio revision 21 update

Change-Id: I61a6fa657aae08760a73816d5ad5536957a3be20
diff --git a/docs/html/tools/sdk/tools-notes.jd b/docs/html/tools/sdk/tools-notes.jd
index ed48887..11e3ec7 100644
--- a/docs/html/tools/sdk/tools-notes.jd
+++ b/docs/html/tools/sdk/tools-notes.jd
@@ -898,7 +898,7 @@
             <li>Added a flag that sets <em>jumbo mode</em> for DEX files, which allows a larger
               number of strings in the DEX files. Enable this mode by adding the following line to
               the {@code project.properties} file of your project:
-              <pre>set dex.force.jumbo=true</pre></li>
+              <pre>dex.force.jumbo=true</pre></li>
             <li>Improved the build time by pre-dexing libraries (both JAR files and library
               projects).</li>
             <li>Updated the build to generate {@code R} resource classes for library projects