Parsing filter values with {{}} has unwanted side effects.

[lkalwa]

Parsing without curlies:

[1] pry(main)> value = "*name*"
=> "*name*"
[2] pry(main)> Graphiti::Scoping::Filter.new(nil, nil, nil).parse_string_arrays(value, false)
=> "*name*"
[3] pry(main)> value
=> "*name*"

Parsing with curlies:

[4] pry(main)> value = "{{*name*}}"
=> "{{*name*}}"
[5] pry(main)> Graphiti::Scoping::Filter.new(nil, nil, nil).parse_string_arrays(value, false)
=> "*name*"
[6] pry(main)> value
=> ""

In the latter case if you want to reuse the value for anything it's lost.
All of that happens because of this line:
https://github.com/graphiti-api/graphiti/blob/master/lib/graphiti/scoping/filter.rb#L196
There is a gsub! on a value passed to the method that causes described side effect.