E2 Editor: Fixed old E2s having broken bracket highlighting
Bug also added a space to all lines, and broke find and a few other features
It only occured in E2s read from a file saved before July, when Garry decided
to change the default file read/write operation from textmode to binary,
because "previously it always read in binary mode anyway", despite all evidence
garrynewman/garrysmod@9cfd592a42945733bca1ed8f76765043b83b3419