Autocomplete crashes cmk if at the end of uuid string

[borisstoyanov]

When you are towards the end of the uuid string and tab to auto complete it crashes cmk.

out of range exception appears:

(localcloud) 🐱 >
panic: runtime error: slice bounds out of range [:22] with capacity 20

goroutine 19 [running]:
github.com/chzyer/readline.(*opCompleter).truncateBufferAfterLastEqual(0xc0000e7490, {0xc0014fa040, 0x14, 0x14})
	/home/shwstppr/lab/shapeblue/cloudstack-cloudmonkey/vendor/github.com/chzyer/readline/complete.go:54 +0x1e9
github.com/chzyer/readline.(*opCompleter).writeRunes(0xc0000e7490, {0xc0014fa000, 0x10000c0000efc28?, 0x24})
	/home/shwstppr/lab/shapeblue/cloudstack-cloudmonkey/vendor/github.com/chzyer/readline/complete.go:70 +0x8d
github.com/chzyer/readline.(*opCompleter).OnComplete(0xc0000e7490)
	/home/shwstppr/lab/shapeblue/cloudstack-cloudmonkey/vendor/github.com/chzyer/readline/complete.go:125 +0x1b2
github.com/chzyer/readline.(*Operation).ioloop(0xc0000e73b0)
	/home/shwstppr/lab/shapeblue/cloudstack-cloudmonkey/vendor/github.com/chzyer/readline/operation.go:180 +0xd0f
created by github.com/chzyer/readline.NewOperation in goroutine 1
	/home/shwstppr/lab/shapeblue/cloudstack-cloudmonkey/vendor/github.com/chzyer/readline/operation.go:88 +0x2c6