Where does the LRB object in "SHSpreadPathGithub.R"come from?

[lancuozhuoma]

When I run SHSpreadPathGithub.R, I find line 342, 'binforddat$annual_move < -LRB $dismov', with an Error: object 'LRB' not found. Obviously, LRB doesn't appear in the previous code, so where should I find it? Or how to fix it?