More compliant cap.Differs documentation.

Deprecation has a stylized comment format as per go.dev.

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>

cap/flags.go

diff --git a/cap/flags.go b/cap/flags.go
index 88ad355..df7a9a5 100644
--- a/cap/flags.go
+++ b/cap/flags.go
@@ -208,9 +208,23 @@
 // Differs processes the result of Compare and determines if the
 // Flag's components were different.
 //
-// Use of this function is deprecated in favor of the (Diff).Has()
-// function, where Diff is returned as a result of the (*Set).Cf()
-// function.
+// Deprecated: Replace with (Diff).Has().
+//
+// Example, replace this:
+//
+//    diff, err := a.Compare(b)
+//    ...
+//    if diff & (1 << Effective) {
+//       ... different effective capabilities ...
+//    }
+//
+// with this:
+//
+//    diff, err := a.Cf(b)
+//    ...
+//    if diff.Has(Effective) {
+//       ... different effective capabilities ...
+//    }
 func Differs(cf uint, vec Flag) bool {
 	return cf&(1<<vec) != 0
 }