Adjust comment in documentation requirements.txt
@@ -4,7 +4,7 @@ recommonmark==0.4.0
sphinx-copybutton
alabaster_jupyterhub
traitlets
-# install BinderHub but because `pip install` is executed in the root
-# directory of this repository we write '.' here not '..' as you might
-# expect when thinking relative to this file.
+# install BinderHub from source but because `pip install` is executed in the
+# root directory (not this directory) of this repository we write '.' here
+# not '..' as you might expect when thinking relative to this file.
-e .
