fix(input): fix clearing of reg_executing

vim-patch:8.2.4705

test/functional/editor/macro_spec.lua

@@ -6,11 +6,13 @@ local feed = helpers.feed
 local clear = helpers.clear
 local expect = helpers.expect
 local command = helpers.command
+local meths = helpers.meths
 local insert = helpers.insert
 local curbufmeths = helpers.curbufmeths
 
+before_each(clear)
+
 describe('macros', function()
-  before_each(clear)
   it('can be recorded and replayed', function()
     feed('qiahello<esc>q')
     expect('hello')
@@ -47,9 +49,34 @@ hello]]
   end)
 end)
 
-describe('reg_recorded()', function()
-  before_each(clear)
+describe('immediately after a macro has finished executing,', function()
+  before_each(function()
+    command([[let @a = 'gg0']])
+  end)
 
+  describe('characters from a mapping are not treated as a part of the macro #18015', function()
+    before_each(function()
+      command('nnoremap s qa')
+    end)
+
+    it('if the macro does not end with a <Nop> mapping', function()
+      feed('@asq')  -- "q" from "s" mapping should start recording a macro instead of being no-op
+      eq({mode = 'n', blocking = false}, meths.get_mode())
+      expect('')
+      eq('', eval('@a'))
+    end)
+
+    it('if the macro ends with a <Nop> mapping', function()
+      command('nnoremap 0 <Nop>')
+      feed('@asq')  -- "q" from "s" mapping should start recording a macro instead of being no-op
+      eq({mode = 'n', blocking = false}, meths.get_mode())
+      expect('')
+      eq('', eval('@a'))
+    end)
+  end)
+end)
+
+describe('reg_recorded()', function()
   it('returns the correct value', function()
     feed [[qqyyq]]
     eq('q', eval('reg_recorded()'))