Fix bug when docs are missing
Fix bug when docs are missing

rrthomas/luarocks,usstwxy/luarocks,starius/luarocks,coderstudy/luarocks,luarocks/luarocks,ignacio/luarocks,keplerproject/luarocks,keplerproject/luarocks,xpol/luarocks,rrthomas/luarocks,aryajur/luarocks,luarocks/luarocks,lxbgit/luarocks,tst2005/luarocks,aryajur/luarocks,leafo/luarocks,xpol/luarocks,robooo/luarocks,ignacio/luarocks,aryajur/luarocks,starius/luarocks,leafo/luarocks,xiaq/luarocks,ignacio/luarocks,ignacio/luarocks,usstwxy/luarocks,xpol/luarocks,starius/luarocks,keplerproject/luarocks,xpol/luavm,coderstudy/luarocks,xiaq/luarocks,robooo/luarocks,xpol/luavm,robooo/luarocks,keplerproject/luarocks,xiaq/luarocks,xpol/luavm,coderstudy/luarocks,tst2005/luarocks,usstwxy/luarocks,tst2005/luarocks,aryajur/luarocks,xpol/luavm,rrthomas/luarocks,xpol/luainstaller,xpol/luarocks,lxbgit/luarocks,lxbgit/luarocks,xpol/luainstaller,xpol/luainstaller,tst2005/luarocks,lxbgit/luarocks,usstwxy/luarocks,tarantool/luarocks,luarocks/luarocks,starius/luarocks,xiaq/luarocks,coderstudy/luarocks,tarantool/luarocks,xpol/luavm,xpol/luainstaller,tarantool/luarocks,rrthomas/luarocks,robooo/luarocks,leafo/luarocks