path/filepath: fix typo in comment

Change-Id: I0c76e8deae49c1149647de421503c5175028b948
Reviewed-on: https://go-review.googlesource.com/24781
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/path/filepath/path.go

@@ -222,7 +222,7 @@ func Ext(path string) string {
 // links.
 // If path is relative the result will be relative to the current directory,
 // unless one of the components is an absolute symbolic link.
-// EvalSymlinks call Clean on the result.
+// EvalSymlinks calls Clean on the result.
 func EvalSymlinks(path string) (string, error) {
 	return evalSymlinks(path)
 }