Escaped backslashes in termination of command substitutions within strings

[cshorler]

the following snippet breaks following format due to the treatment of \]

set parent_prefix "^[re_escape ${parent_path}\\].*"
puts {hello, world}

fixed by PR #23

[bitwisecook]

Your PR looks good, thank you for digging into this! I'll get a release out this week with the merge.

[cshorler]

thanks!