Fix a typo

Dave Abrahams · Dave Abrahams · commit 22aa340fd469 · 2017-05-01T02:32:22.000-07:00
diff --git a/test/Prototypes/UnicodeDecoders.swift b/test/Prototypes/UnicodeDecoders.swift
@@ -13,7 +13,7 @@
 // RUN: %target-run %T/UnicodeDecoders
 // REQUIRES: executable_test
 
-// Benchmarking: use the following script with your swift-4-enabbled swiftc.
+// Benchmarking: use the following script with your swift-4-enabled swiftc.
 // The BASELINE timings come from the existing standard library Codecs
 
 /* 
