travis: Missing space.
travis: Missing space.

Also output a message about which form was chosen.

litex-hub/litex-conda-compilers,timvideos/conda-hdmi2usb-packages,litex-hub/litex-conda-eda,timvideos/conda-misoc-lm32,SymbiFlow/conda-packages,SymbiFlow/conda-packages,timvideos/conda-misoc-lm32,litex-hub/litex-conda-prog,timvideos/conda-hdmi2usb-packages