Fix the README reference to the License file.

Also a minor change to the cap examples in the package overview doc.

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
diff --git a/cap/README b/cap/README
index 3ac8433..f257d44 100644
--- a/cap/README
+++ b/cap/README
@@ -4,7 +4,7 @@
    https://sites.google.com/site/fullycapable/
 
 Like libcap, the cap package is distributed with a "you choose"
-License. Specifically: BSD three clause, or GPL2. See the LICENSE
+License. Specifically: BSD three clause, or GPL2. See the License
 file.
 
 Andrew G. Morgan <morgan@kernel.org>
diff --git a/cap/cap.go b/cap/cap.go
index ae40c00..5263c34 100644
--- a/cap/cap.go
+++ b/cap/cap.go
@@ -28,7 +28,7 @@
 //       log.Fatalf("failed to drop privilege: %q -> %q: %v", old, empty, err)
 //   }
 //   now := cap.GetProc()
-//   if cap.Differs(now.Compare(empty)) {
+//   if cf, _ := now.Compare(empty); cf != 0 {
 //       log.Fatalf("failed to fully drop privilege: have=%q, wanted=%q", now, empty)
 //   }
 //
diff --git a/psx/README b/psx/README
index cd9c651..e4f9001 100644
--- a/psx/README
+++ b/psx/README
@@ -23,6 +23,6 @@
 
 Like libcap/libpsx itself, the "psx" package is distributed with a
 "you choose" License. Specifically: BSD three clause, or GPL2. See the
-LICENSE file.
+License file.
 
 Andrew G. Morgan <morgan@kernel.org>