unix/internal/mkmerge: correct typo

Change-Id: Icaa541758d4077aa3c5755e16effa0ce173a2335
GitHub-Last-Rev: 2fcf892e3e4c0ea9b29e868d33b8142a31daaa84
GitHub-Pull-Request: golang/sys#121
Reviewed-on: https://go-review.googlesource.com/c/sys/+/392234
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/unix/internal/mkmerge/mkmerge.go b/unix/internal/mkmerge/mkmerge.go
index efcdede..f307c30 100644
--- a/unix/internal/mkmerge/mkmerge.go
+++ b/unix/internal/mkmerge/mkmerge.go
@@ -14,7 +14,7 @@
 //     $ mkmerge -out zerrors_linux.go zerrors_linux_*.go
 //
 // mkmerge performs the merge in the following steps:
-//     1. Construct the set of common code that is idential in all
+//     1. Construct the set of common code that is identical in all
 //        architecture-specific files.
 //     2. Write this common code to the merged file.
 //     3. Remove the common code from all architecture-specific files.