doc: clarify sentence

Change-Id: I6eb182968a8e00fe359d812f1eefc9bda896395b
GitHub-Last-Rev: a354b4d2168ed4f1f1744c99c36ece276a24e046
GitHub-Pull-Request: golang/go#25540
Reviewed-on: https://go-review.googlesource.com/114318Reviewed-by: Rob Pike <r@golang.org>

doc/go_faq.html

@@ -45,7 +45,7 @@ analysis easy and avoids much of the overhead of C-style include files and
 libraries.
 <li>
 Go's type system has no hierarchy, so no time is spent defining the
-relationships between types. Also, although Go has static types the language
+relationships between types. Also, although Go has static types, the language
 attempts to make types feel lighter weight than in typical OO languages.
 <li>
 Go is fully garbage-collected and provides fundamental support for