Merge pull request #190 from hunter-mongo/DOCSP-50528

DOCSP-50528: typo fix

Author: hunter-mongo

source/style-guide/writing/use-present-tense.txt

@@ -29,7 +29,7 @@ emphasize that something occurs later from the users' perspective.
 The past tense may be used when you need to refer to a past event or,
 more often, an earlier software release. Limit references to earlier
 versions to the immediate prior release. If a user wants to learn about
-something earlier than that can refer to an earlier version of the
+something earlier than that they can refer to an earlier version of the
 documentation.
 
 .. tip::