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Fixed typos in article.md

There were some typos in the first line of A semicolon section. (Line 122).  I have proposed a possible fix.
A
Ashmeet Singh committed
0cecd96f1dd0a73c45bf9ee033287a39034b1899
Parent: 168b273
Committed by GitHub <noreply@github.com> on 6/6/2017, 11:00:23 AM