Template:1921 NL Record vs. opponents/doc

This is a template that was created to easily update every article with the 1921 Record vs. opponents. To use the update on any article, insert:

To highlight the Boston Braves, insert:

For the other teams, use:
 * Boston Braves – BOS
 * Brooklyn Robins – BR
 * Chicago Cubs – CHC
 * Cincinnati Reds – CIN
 * New York Giants – NYG
 * Philadelphia Phillies – PHI
 * Pittsburgh Pirates – PIT
 * St. Louis Cardinals – STL