docs: clarify actual behavior of <Plug>

runtime/doc/map.txt

@@ -65,9 +65,8 @@ modes.
 			where the map command applies.  Disallow mapping of
 			{rhs}, to avoid nested and recursive mappings.  Often
 			used to redefine a command.
-			Note: "nore" is ignored for a mapping whose result
-			starts with <Plug>.  <Plug> is always remapped even if
-			"nore" is used.
+			Note: A mapping whose {lhs} starts with <Plug> is
+			always applied even if mapping is disallowed.
 
 
 :unm[ap]  {lhs}			|mapmode-nvo|		*:unm*  *:unmap*

runtime/doc/vim_diff.txt

@@ -358,6 +358,10 @@ Macro/|recording| behavior
   macros and 'keymap' at the same time. This also means you can use |:imap| on
   the results of keys from 'keymap'.
 
+Mappings:
+- A mapping whose {lhs} starts with <Plug> is always applied even if mapping
+  is disallowed by |nore|.
+
 Motion:
   The |jumplist| avoids useless/phantom jumps.
 
@@ -442,9 +446,6 @@ Working directory (Vim implemented some of these later than Nvim):
 - `getcwd(-1)` is equivalent to `getcwd(-1, 0)` instead of returning the global
   working directory. Use `getcwd(-1, -1)` to get the global working directory.
 
-Mappings:
-- |nore| is ignored for rhs <Plug> mappings. <Plug> mappings are always remapped.
-
 ==============================================================================
 5. Missing legacy features				 *nvim-features-missing*
 

test/functional/ex_cmds/map_spec.lua

@@ -30,7 +30,7 @@ describe(':*map', function()
     expect('-foo-')
   end)
 
-  it('<Plug> keymaps ignore nore', function()
+  it('<Plug> mappings ignore nore', function()
     command('let x = 0')
     eq(0, meths.eval('x'))
     command [[
@@ -43,7 +43,8 @@ describe(':*map', function()
     feed('increase_x_noremap')
     eq(2, meths.eval('x'))
   end)
-  it("Doesn't auto ignore nore for keys before or after <Plug> keymap", function()
+
+  it("Doesn't auto ignore nore for keys before or after <Plug> mapping", function()
     command('let x = 0')
     eq(0, meths.eval('x'))
     command [[