/usr/share/fonts-font-awesome/less/screen-reader.less is in fonts-font-awesome 4.7.0~dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | // Screen Readers
// -------------------------
.sr-only { .sr-only(); }
.sr-only-focusable { .sr-only-focusable(); }
|