wtf ctrl z

gistfile1.txt

KeyPress event, serial 38, synthetic NO, window 0x6600001,
    root 0x2c5, subw 0x0, time 30006425, (149,-306), root:(2069,278),
    state 0x10, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

FocusOut event, serial 38, synthetic NO, window 0x6600001,
    mode NotifyGrab, detail NotifyAncestor

FocusIn event, serial 38, synthetic NO, window 0x6600001,
    mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 38, synthetic NO, window 0x0,
    keys:  88  0   0   0   32  0   0   0   0   0   0   0   0   0   0   0   
           0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   0   

KeyRelease event, serial 38, synthetic NO, window 0x6600001,
    root 0x2c5, subw 0x0, time 30009961, (149,-306), root:(2069,278),
    state 0x14, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

gistfile2.txt

KeyPress event, serial 38, synthetic NO, window 0x6600001,
    root 0x2c5, subw 0x0, time 29903378, (-274,188), root:(1711,227),
    state 0x4010, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 38, synthetic NO, window 0x6600001,
    root 0x2c5, subw 0x0, time 29905354, (-275,190), root:(1710,229),
    state 0x4014, keycode 25 (keysym 0x7a, z), same_screen YES,
    XLookupString gives 1 bytes: (1a) ""
    XmbLookupString gives 1 bytes: (1a) ""
    XFilterEvent returns: False

KeyRelease event, serial 38, synthetic NO, window 0x6600001,
    root 0x2c5, subw 0x0, time 29905554, (-275,190), root:(1710,229),
    state 0x4014, keycode 25 (keysym 0x7a, z), same_screen YES,
    XLookupString gives 1 bytes: (1a) ""
    XFilterEvent returns: False

KeyRelease event, serial 38, synthetic NO, window 0x6600001,
    root 0x2c5, subw 0x0, time 29906682, (-275,190), root:(1710,229),
    state 0x4014, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False