Update readme description to reference new completion strategy

ericfreese · ericfreese · commit cdf6be4f0617 · 2019-06-22T16:54:03.000-06:00
diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@
 
 _[Fish](http://fishshell.com/)-like fast/unobtrusive autosuggestions for zsh._
 
-It suggests commands as you type.
+It suggests commands as you type based on history and completions.
 
 Requirements: Zsh v4.3.11 or later
 
