add more test cases for XML Doc
add more test cases for XML Doc

dungpa/PowerTools,bleis-tift/FSharpVSPowerTools,enricosada/VisualFSharpPowerTools,dkinitiate/VisualFSharpPowerTools,yever/VisualFSharpPowerTools,ovatsus/VisualFSharpPowerTools,bleis-tift/FSharpVSPowerTools,cloudRoutine/VisualFSharpPowerTools,bentayloruk/FSharpVSPowerTools,vasily-kirichenko/FSharpVSPowerTools,dedale/VisualFSharpPowerTools,smoothdeveloper/VisualFSharpPowerTools,isaacabraham/VisualFSharpPowerTools,0x53A/VisualFSharpPowerTools,enricosada/VisualFSharpPowerTools,vasily-kirichenko/FSharpVSPowerTools,fsprojects/VisualFSharpPowerTools,cloudRoutine/VisualFSharpPowerTools,xperiandri/VisualFSharpPowerTools,forki/FSharpVSPowerTools,fsprojects/VisualFSharpPowerTools