ruby on rails - Bold a part of string in emblem -

ruby on rails - Bold a part of string in emblem -

i new emblem , right trying bold portion of string in emblem adding tag show them string.

i want bold text "apple safari" here , code is:

.class-name: .class-name2 recent version of apple safari

required string should this:

a recent version of apple safari

okay got working right adding span before plain text , code is

.class-name: .class-name2 %span recent version of %span.bold google chrome

previously trying this

.class-name: .class-name2 recent version of %span.bold google chrome

and giving error.

ruby-on-rails ember.js emblem.js emblems