Names starting with underscore shows errors Page doesnot exists for gh-pages branch

Question

I have an issue with gh-pages of github. The html pages which start with _ ( underscore ) shows the error.

Page does not exist! Read the Full Documentation
Instructions for setting up username.github.com and stuffs.

For eg : Lets take an example

https://github.com/harikt/docs/blob/gh-pages/api/Aura.Di/_src.html

is the source

It should render at http://harikt.github.com/docs/api/_src.html

But currently its not. It only happens for the names starting with _ ( underscore ). Let me know if anyone have the same issue or can it be resolved without renaming it ?