gapis/resolve: Fix panic in the CommandTree builder.
gapis/resolve: Fix panic in the CommandTree builder.

The marker grouper would terminate incomplete marker groups with 1 greater than the number of atoms in the capture.

Fixes #445

google/agi,pmuetschard/gapid,Qining/gapid,dsrbecky/gapid,baldwinn860/gapid,google/agi,ek9852/gapid,ben-clayton/gapid,ben-clayton/gapid,baldwinn860/gapid,Qining/gapid,Qining/gapid,dsrbecky/gapid,ben-clayton/gapid,dsrbecky/gapid,google/gapid,Qining/gapid,google/gapid,google/agi,google/gapid,baldwinn860/gapid,ek9852/gapid,baldwinn860/gapid,dsrbecky/gapid,ek9852/gapid,ben-clayton/gapid,google/gapid,google/agi,baldwinn860/gapid,google/gapid,Qining/gapid,ben-clayton/gapid,baldwinn860/gapid,google/agi,dsrbecky/gapid,google/agi,ek9852/gapid,Qining/gapid,pmuetschard/gapid,dsrbecky/gapid,baldwinn860/gapid,ek9852/gapid,pmuetschard/gapid,pmuetschard/gapid,Qining/gapid,pmuetschard/gapid,ben-clayton/gapid,ben-clayton/gapid,dsrbecky/gapid,google/gapid,ek9852/gapid,pmuetschard/gapid,dsrbecky/gapid,baldwinn860/gapid,Qining/gapid,ek9852/gapid,google/agi,google/gapid,ben-clayton/gapid,pmuetschard/gapid,pmuetschard/gapid,ek9852/gapid,google/agi,google/gapid