The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form.  A

.input-group-text,\n  .input-group-text + .btn {\n    margin-left: -$input-border-width;\n  }\n}\n\n.input-group-prepend { margin-right: -$input-border-width; }\n.input-group-append { margin-left: -$input-border-width; }\n\n\n// Textual addons\n//\n// Serves as a catch-all element for any text or radio/checkbox input you wish\n// to prepend or append to an input.\n\n.input-group-text {\n  display: flex;\n  align-items: center;\n  padding: $input-padding-y $input-padding-x;\n  margin-bottom: 0; // Allow...