runtime(vim): Update base-syntax, fix :unabbrev highlighting (#14077)

Fixes issue #7876

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

runtime/syntax/testdir/input/vim_ex_abbreviate.vim

@@ -0,0 +1,25 @@
+" Vim :abbreviate commands
+
+abbrev <buffer> foo foobar
+cabbrev <buffer> cfoo cfoobar
+iabbrev <buffer> ifoo cfoobar
+
+abbrev <expr> <buffer> foo foobar
+cabbrev <expr> <buffer> cfoo cfoobar
+iabbrev <expr> <buffer> ifoo cfoobar
+
+noreabbrev <buffer> foo foobar
+cnoreabbrev <buffer> cfoo cfoobar
+inoreabbrev <buffer> ifoo cfoobar
+
+abbrev <expr> <buffer> foo foobar
+cabbrev <expr> <buffer> cfoo cfoobar
+iabbrev <expr> <buffer> ifoo cfoobar
+
+unabbrev <buffer> foo
+cunabbrev <buffer> cfoo
+iunabbrev <buffer> ifoo
+
+abclear <buffer>
+cabclear <buffer>
+iabclear <buffer>

runtime/syntax/testdir/input/vim_ex_map.vim

@@ -0,0 +1,21 @@
+" Vim :map commands
+
+map!
+map! lhs rhs
+map 
+map lhs rhs
+
+call map(list, 'v:val')
+call map (list, 'v:val')
+
+mapclear  <buffer>
+mapclear! <buffer>
+nmapclear <buffer>
+vmapclear <buffer>
+xmapclear <buffer>
+smapclear <buffer>
+omapclear <buffer>
+imapclear <buffer>
+lmapclear <buffer>
+cmapclear <buffer>
+tmapclear <buffer>

runtime/syntax/testdir/input/vim_map.vim

@@ -1,9 +0,0 @@
-" Vim map commands
-
-map!
-map! lhs rhs
-map 
-map lhs rhs
-
-call map(list, 'v:val')
-call map (list, 'v:val')