Update badges in buttons examples
Update badges in buttons examples

- Given buttons a required modifier (.btn alone is incomplete)
- Given the primary button, use a .badge-light for better contrast
- Consolidate example and highlight code with a `{% example %}` block

fschumann1211/bootstrap,lipis/bootstrap,vsn4ik/bootstrap,kvlsrg/bootstrap,afuno/bootstrap,seanwu99/bootstrap,yuyokk/bootstrap,SweetProcess/bootstrap,creativewebjp/bootstrap,Hemphill/bootstrap-docs,janseliger/bootstrap,coliff/bootstrap,janseliger/bootstrap,gijsbotje/bootstrap,creativewebjp/bootstrap,GerHobbelt/bootstrap,johnajacob/bootstrap,peterblazejewicz/bootstrap,SweetProcess/bootstrap,creativewebjp/bootstrap,9-chirno/chirno,NCARB/bootstrap,Hemphill/bootstrap-docs,andresgalante/bootstrap,bardiharborow/bootstrap,Lyricalz/bootstrap,jipexu/bootstrap,bootstrapbrasil/bootstrap,bardiharborow/bootstrap,yuyokk/bootstrap,Delagen/bootstrap,jipexu/bootstrap,Delagen/bootstrap,yuyokk/bootstrap,afuno/bootstrap,supergibbs/bootstrap,joblocal/bootstrap,vsn4ik/bootstrap,nice-fungal/bootstrap,SweetProcess/bootstrap,supergibbs/bootstrap,bootstrapbrasil/bootstrap,andresgalante/bootstrap,joblocal/bootstrap,m5o/bootstrap,johnajacob/bootstrap,bardiharborow/bootstrap,supergibbs/bootstrap,Lyricalz/bootstrap,twbs/bootstrap,nice-fungal/bootstrap,bardiharborow/bootstrap,peterblazejewicz/bootstrap,TheFridayInstitute/bootstrap,janseliger/bootstrap,stanwmusic/bootstrap,jipexu/bootstrap,tjkohli/bootstrap,janseliger/bootstrap,GerHobbelt/bootstrap,realcrowd/bootstrap,andresgalante/bootstrap,joblocal/bootstrap,xt0rted/bootstrap,lipis/bootstrap,tjkohli/bootstrap,vsn4ik/bootstrap,tibo66/bootstrap,stanwmusic/bootstrap,bootstrapbrasil/bootstrap,tagliala/bootstrap,coliff/bootstrap,andresgalante/bootstrap,GerHobbelt/bootstrap,Delagen/bootstrap,xt0rted/bootstrap,tibo66/bootstrap,joblocal/bootstrap,TheFridayInstitute/bootstrap,m5o/bootstrap,tagliala/bootstrap,fschumann1211/bootstrap,9-chirno/chirno,tagliala/bootstrap,Lyricalz/bootstrap,zalog/bootstrap,9-chirno/chirno,johnajacob/bootstrap,NCARB/bootstrap,yuyokk/bootstrap,nice-fungal/bootstrap,stanwmusic/bootstrap,gijsbotje/bootstrap,gijsbotje/bootstrap,9-chirno/chirno,fschumann1211/bootstrap,Hemphill/bootstrap-docs,SweetProcess/bootstrap,peterblazejewicz/bootstrap,jipexu/bootstrap,twbs/bootstrap,inway/bootstrap,realcrowd/bootstrap,realcrowd/bootstrap,zalog/bootstrap,lipis/bootstrap,zalog/bootstrap,Delagen/bootstrap,creativewebjp/bootstrap,supergibbs/bootstrap,tibo66/bootstrap,inway/bootstrap,xt0rted/bootstrap,seanwu99/bootstrap,lipis/bootstrap,realcrowd/bootstrap,fschumann1211/bootstrap,xt0rted/bootstrap,Lyricalz/bootstrap,vsn4ik/bootstrap,kvlsrg/bootstrap,afuno/bootstrap,NCARB/bootstrap,seanwu99/bootstrap,NCARB/bootstrap,TheFridayInstitute/bootstrap,seanwu99/bootstrap,inway/bootstrap,afuno/bootstrap,Hemphill/bootstrap-docs,johnajacob/bootstrap,tibo66/bootstrap,gijsbotje/bootstrap,stanwmusic/bootstrap,TheFridayInstitute/bootstrap,kvlsrg/bootstrap