Merge branch 'lintao/docs/dummy-test' into 'master'

dummy docs.

See merge request cepc/CEPCSW!84

docs/source/generator/gentools.md

+# GenTools design
+
+Under construction.
\ No newline at end of file

docs/source/index.rst

@@ -37,6 +37,7 @@ Contents
    :caption: Generator
 
    generator/overview.md
+   generator/gentools.md
 
 .. toctree::
    :maxdepth: 2