Generate-for-loop failing with begin-end delimiter missing

Summary

A generate-for-loop with the for loop content not wrapped in a begin-end clause leads tmrg to fail.

Steps to reproduce

In commit f967b040 see file forloop_generate04.sv.

cd test/systemverilog
../../bin/tmrg forloop_generate04.sv

What is the current bug behavior

tmrg fails

What is the correct behavior

tmrg should pass

Additional information