Fix docfx.js bug when path is empty (#1623)
Fix docfx.js bug when path is empty (#1623)


hellosnow/docfx,dotnet/docfx,hellosnow/docfx,928PJY/docfx,DuncanmaMSFT/docfx,DuncanmaMSFT/docfx,pascalberger/docfx,hellosnow/docfx,superyyrrzz/docfx,dotnet/docfx,pascalberger/docfx,dotnet/docfx,pascalberger/docfx,928PJY/docfx,superyyrrzz/docfx,superyyrrzz/docfx,928PJY/docfx