Added support for percent-encoding variables when referenced

[kibiz0r]

Problem

This almost certainly doesn't do what you want, because the & will not get percent-encoded:

@name = Strunk & White

GET https://{{host}}/authors/{{name}}

However, we can't assume we should always percent-encode the value of a variable.

So we need some sort of helper.

Proposed Solution

New syntax for referencing a file variable: {{%foo}} This tells us to percent-encode the value.

Example:

@name = Strunk & White

GET https://{{host}}/authors/{{%name}}

[kibiz0r]

@Huachao Any thoughts?

[pfzim]

@Huachao I support adding this functionality! Very useful when getting tokens from a response that contains characters that require escaping.

@someparam = abcd&efgh
GET https://localhost/abc?p={{%someparam}}

[Huachao]

@kibiz0r Merged, thanks. And it will be published in the next release