Fixed syntax in brackets renderer

Brackets representation renderer:
Dict of compressions for short hand and to avoid syntactically illegal spaces

> ‘First Subject Group’: ‘1st-Gr.’,
> 'First Group': ‘1st-Gr.’,
> ‘Second Subject Group’: ‘2nd-Gr.’,
> 'Second Group’: ‘2nd-Gr.’,
> ‘Theme ‘: ‘Th.’,
> 
> 'Exposition’: ‘Exp.’,
> 'Development’: ‘Dev.’,
> 'Recapitulation’: ‘Recap.’,
> 
> 'Transition’: ‘Tr.’,
> 
> ‘ ‘: ‘~’