Estimated hours taken: 1
Branches: main
library/string.m:
Fix a bug in string__join_list pointed out by Fergus; the length
calculation and the string copying now use the same logic.
library/tests/hard_coded/join_list.{m,exp}:
A new test case to exercise string__join_list.
library/tests/hard_coded/Mmakefile:
Enable the new test.
