Update readme.

Ned Zimmerman · Ned Zimmerman · commit 312d1613f783 · 2017-06-01T18:51:13.000-03:00
diff --git a/README.md b/README.md
@@ -459,7 +459,7 @@ Display the database table prefix.
 wp db prefix
 ~~~
 
-Display the database table prefix specified in wp-config.php.
+Display the database table prefix, as defined by the database handler's interpretation of the current site.
 
 **EXAMPLES**
 
