extract does not catch strings without delimiters

[mrwogu]

For example:
<span data-bs-tooltip="'LANG_INFO' | translate"></span>

In my .pot i don't see LANG_INFO to translate.

Edit:
It looks that the angular-gettext-tools does not catch string with data- prefix.

<span bs-tooltip="'LANG_INFO' | translate"></span>
works fine