remove number zero from group number map #1181
Merged
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This fixes issue #1180.
StumpWM expects group numbers to grow incrementally and for their numbers to match the group-number-map. However because group numbers start from one the tenth group created gets the group number ten, while the group-number-map and associated function group-map-number report its number as zero, because zero is the tenth character in that string. Removing the zero from the string removes this inconsistency, as any group-map-number that isnt present in the string is returned via princ-to-string.