Remove the extra space after punctuation

Style note²Law reviews22nd edition only

A standard proportional font takes a single space after punctuation, keeping the double space only for monospaced families such as Courier. A double space is an error the word processor already corrects.¹

1. 1R. 2.3 Other Punctuation Conventions.
2. 2A style note: the rule in note 1 allows both forms and prefers one.