i18n._ function removes unrecognized macros

[nmoinvaz]

Describe the bug i18n._ removes macros that are unrecognized. This prevents programs that also parse macros in strings from handling them after Lingui loads them.

To Reproduce Using the following code:

i18n._("code {hello}")

The string returned is code .

Expected behavior It should return code {hello} because no values object was passed to i18n._.

Alternatives ideas

1. Perhaps there is a callback that can be triggered when it encounters a macro it doesn't recognize?
2. Or an option that can be enabled for this behavior?
3. Or another function that does not process macros but can get the locale string.