diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
index da6c780..f85e3bb 100644
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@@ -6513,11 +6513,11 @@ The alternative is to make two failure states compare equal and any valid state
##### Note
-This rule applies to all the usual comparison operators: `!=`, `<`, `<=`, `>`, and `>=`.
+This rule applies to all the usual comparison operators: `!=`, `<`, `<=`, `>`, `>=`, and `<=>`.
##### Enforcement
-* Flag an `operator==()` for which the argument types differ; same for other comparison operators: `!=`, `<`, `<=`, `>`, and `>=`.
+* Flag an `operator==()` for which the argument types differ; same for other comparison operators: `!=`, `<`, `<=`, `>`, `>=`, and `<=>`.
* Flag member `operator==()`s; same for other comparison operators: `!=`, `<`, `<=`, `>`, and `>=`.
### C.87: Beware of `==` on base classes
@@ -6562,11 +6562,11 @@ Of course there are ways of making `==` work in a hierarchy, but the naive appro
##### Note
-This rule applies to all the usual comparison operators: `!=`, `<`, `<=`, `>`, `>=`, and `<=>`.
+This rule applies to all the usual comparison operators: `!=`, `<`, `<=`, `>`, and `>=`.
##### Enforcement
-* Flag a virtual `operator==()`; same for other comparison operators: `!=`, `<`, `<=`, `>`, `>=`, and `<=>`.
+* Flag a virtual `operator==()`; same for other comparison operators: `!=`, `<`, `<=`, `>`, and `>=`.
### C.89: Make a `hash` `noexcept`
@@ -19414,6 +19414,22 @@ It is almost always a bug to mention an unnamed namespace in a header file.
Nothing external can depend on an entity in a nested unnamed namespace.
Consider putting every definition in an implementation source file in an unnamed namespace unless that is defining an "external/exported" entity.
+##### Example; bad
+
+ static int f();
+ int g();
+ static bool h();
+ int k();
+
+##### Example; good
+
+ namespace {
+ int f();
+ bool h();
+ }
+ int g();
+ int k();
+
##### Example
An API class and its members can't live in an unnamed namespace; but any "helper" class or function that is defined in an implementation source file should be at an unnamed namespace scope.