go/analysis: fix package doc copy-paste typo

Change-Id: I17495106c76bbf270f621abe2eca367ed818a79b
Reviewed-on: https://go-review.googlesource.com/c/156500
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/go/analysis/passes/lostcancel/cmd/lostcancel/main.go b/go/analysis/passes/lostcancel/cmd/lostcancel/main.go
index 593567b..d48c290 100644
--- a/go/analysis/passes/lostcancel/cmd/lostcancel/main.go
+++ b/go/analysis/passes/lostcancel/cmd/lostcancel/main.go
@@ -1,4 +1,4 @@
-// The nilness command applies the golang.org/x/tools/go/analysis/passes/lostcancel
+// The lostcancel command applies the golang.org/x/tools/go/analysis/passes/lostcancel
 // analysis to the specified packages of Go source code.
 package main