jsonlint fails on '\.' string

[kaze]

This is invalid json, according to jsonlint:

{"line": "\."}

While this is valid:

{"line": "\\."}

This prevents your json file to contain any regular expression.

[Luuk]

see this page for an explanation:
https://stackoverflow.com/questions/19176024/how-to-escape-special-characters-in-building-a-json-string

it refers also to the docs (json.org ):
A string is a sequence of zero or more Unicode characters, wrapped in double quotes, using backslash escapes. A character is represented as a single character string. A string is very much like a C or Java string.
a backslash is only allowed when followed by any of these characters: "\/bdnrtu

[kaze]

Honestly, I cannot recall why this was so important to me to leave a note about it. It seems like you just need to double escape all your backslashes when parsing your regexp to JSON, that's all.