quantum-espresso/test-suite/epw_wfpt/kpath.GammaX.txt

         6 crystal
    0.00    0.00    0.00   1.0
    0.10    0.10    0.00   1.0
    0.20    0.20    0.00   1.0
    0.30    0.30    0.00   1.0
    0.40    0.40    0.00   1.0
    0.50    0.50    0.00   1.0