Escape characters

E.g. using `>` character in a template is currently broken since Bash considers this the output redirect operator. Need to consider escaping such characters from the input before calling `eval`.

Start by reproducing the issue with a template containing the \u003e character, then trace the template input up to the eval call mentioned in the report. Done means template characters such as \u003e are handled as input rather than being interpreted by Bash as output redirection.

Written by the indexing model from the issue text.