runtime(vim): Update base-syntax, fix function tail comments

Match Vim9-script comments after :def and :enddef and legacy-script
comments after :func and :endfunc, in any definition context.

Highlight incorrect comment types after these commands as errors.

fixes: #15062
closes: #15072

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/syntax/testdir/input/vim9_ex_function_def_tail_comment_errors.vim

@@ -0,0 +1,44 @@
+vim9script
+
+# Vim9 :function and :def tail comment errors
+# VIM_TEST_SETUP unlet! g:vimsyn_folding
+
+fun Test1() abort		# fun
+  return 1
+endfun				# endfun
+
+def Test2(): number		" def
+  return 2
+enddef				" enddef
+
+fun Test3() abort		# fun
+  fun s:DoTest3() abort		# fun
+    return 3
+  endfun			# endfun
+  return s:DoTest3()
+endfun				# endfun
+
+def Test4(): number		" def
+  def DoTest4(): number		" def
+    return 4
+  enddef			" enddef
+  return DoTest4()
+enddef				" enddef
+
+def Test5(): number		" def
+  fun DoTest5() abort		# fun
+    return 5
+  endfun			# endfun
+  return DoTest5()
+enddef				" enddef
+
+fun Test6() abort		# fun
+  def s:DoTest6(): number	" def
+    return 6
+  enddef			" enddef
+  return s:DoTest6()
+endfun				# endfun
+
+for d in range(1, 6)
+  exec $'echo Test{d}()'
+endfor

runtime/syntax/testdir/input/vim9_ex_function_def_tail_comments.vim

@@ -0,0 +1,44 @@
+vim9script
+
+# Vim9 :function and :def tail comments
+# VIM_TEST_SETUP unlet! g:vimsyn_folding
+
+fun Test1() abort		" fun
+  return 1
+endfun				" endfun
+
+def Test2(): number		# def
+  return 2
+enddef				# enddef
+
+fun Test3() abort		" fun
+  fun s:DoTest3() abort		" fun
+    return 3
+  endfun			" endfun
+  return s:DoTest3()
+endfun				" endfun
+
+def Test4(): number		# def
+  def DoTest4(): number		# def
+    return 4
+  enddef			# enddef
+  return DoTest4()
+enddef				# enddef
+
+def Test5(): number		# def
+  fun DoTest5() abort		" fun
+    return 5
+  endfun			" endfun
+  return DoTest5()
+enddef				# enddef
+
+fun Test6() abort		" fun
+  def s:DoTest6(): number	# def
+    return 6
+  enddef			# enddef
+  return s:DoTest6()
+endfun				" endfun
+
+for d in range(1, 6)
+  exec $'echo Test{d}()'
+endfor

runtime/syntax/testdir/input/vim_ex_def.vim

@@ -85,7 +85,7 @@ def Foo()
 enddef | echo "Foo"
 
 def Foo()
-enddef " comment
+enddef # comment
 
 
 " parameters

runtime/syntax/testdir/input/vim_ex_def_fold.vim

@@ -86,7 +86,7 @@ def Foo()
 enddef | echo "Foo"
 
 def Foo()
-enddef " comment
+enddef # comment
 
 
 " parameters

runtime/syntax/testdir/input/vim_ex_function_def_tail_comment_errors.vim

@@ -0,0 +1,43 @@
+" Vim :function and :def tail comment errors
+" VIM_TEST_SETUP unlet! g:vimsyn_folding
+
+fun s:Test1() abort		# fun
+  return 1
+endfun				# endfun
+
+def s:Test2(): number		" def
+  return 2
+enddef				" enddef
+
+fun s:Test3() abort		# fun
+  fun s:DoTest3() abort		# fun
+    return 3
+  endfun			# endfun
+  return s:DoTest3() 
+endfun				# endfun
+
+def s:Test4(): number		" def
+  def DoTest4(): number		" def
+    return 4
+  enddef			" enddef
+  return DoTest4()
+enddef				" enddef
+
+def s:Test5(): number		" def
+  fun DoTest5() abort		# fun
+    return 5
+  endfun			# endfun
+  return DoTest5()
+enddef				" enddef
+
+fun s:Test6() abort		# fun
+  def s:DoTest6(): number	" def
+    return 6
+  enddef			" enddef
+  return s:DoTest6()
+endfun				# endfun
+
+for d in range(1, 6)->reverse()
+  exec $'echo s:Test{d}()'
+  exec $'delfunction s:Test{d}'
+endfor

runtime/syntax/testdir/input/vim_ex_function_def_tail_comments.vim

@@ -0,0 +1,43 @@
+" Vim :function and :def tail comments
+" VIM_TEST_SETUP unlet! g:vimsyn_folding
+
+fun s:Test1() abort		" fun
+  return 1
+endfun				" endfun
+
+def s:Test2(): number		# def
+  return 2
+enddef				# enddef
+
+fun s:Test3() abort		" fun
+  fun s:DoTest3() abort		" fun
+    return 3
+  endfun			" endfun
+  return s:DoTest3() 
+endfun				" endfun
+
+def s:Test4(): number		# def
+  def DoTest4(): number		# def
+    return 4
+  enddef			# enddef
+  return DoTest4()
+enddef				# enddef
+
+def s:Test5(): number		# def
+  fun DoTest5() abort		" fun
+    return 5
+  endfun			" endfun
+  return DoTest5()
+enddef				# enddef
+
+fun s:Test6() abort		" fun
+  def s:DoTest6(): number	# def
+    return 6
+  enddef			# enddef
+  return s:DoTest6()
+endfun				" endfun
+
+for d in range(1, 6)->reverse()
+  exec $'echo s:Test{d}()'
+  exec $'delfunction s:Test{d}'
+endfor