patch 8.2.0148: mapping related function in wrong source file

Problem:    Mapping related function in wrong source file.
Solution:   Move the function.  Add a few more test cases. (Yegappan
            Lakshmanan, closes #5528)

src/testdir/test_mapping.vim

@@ -476,6 +476,15 @@ func Test_list_mappings()
   call assert_equal(['n  ,n            <Nop>'],
         \ execute('nmap ,n')->trim()->split("\n"))
 
+  " verbose map
+  call assert_match("\tLast set from .*/test_mapping.vim line \\d\\+$",
+        \ execute('verbose map ,n')->trim()->split("\n")[1])
+
+  " map to CTRL-V
+  exe "nmap ,k \<C-V>"
+  call assert_equal(['n  ,k            <Nop>'],
+        \ execute('nmap ,k')->trim()->split("\n"))
+
   nmapclear
 endfunc
 
@@ -812,4 +821,36 @@ func Test_abbr_remove()
   call assert_equal({}, maparg('foo', 'i', 1, 1))
 endfunc
 
+" Trigger an abbreviation using a special key
+func Test_abbr_trigger_special()
+  new
+  iabbr teh the
+  call feedkeys("iteh\<F2>\<Esc>", 'xt')
+  call assert_equal('the<F2>', getline(1))
+  iunab teh
+  close!
+endfunc
+
+" Test for '<' in 'cpoptions'
+func Test_map_cpo_special_keycode()
+  set cpo-=<
+  imap x<Bslash>k Test
+  let d = maparg('x<Bslash>k', 'i', 0, 1)
+  call assert_equal(['x\k', 'Test', 'i'], [d.lhs, d.rhs, d.mode])
+  call feedkeys(":imap x\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"imap x\k', @:)
+  iunmap x<Bslash>k
+  set cpo+=<
+  imap x<Bslash>k Test
+  let d = maparg('x<Bslash>k', 'i', 0, 1)
+  call assert_equal(['x<Bslash>k', 'Test', 'i'], [d.lhs, d.rhs, d.mode])
+  call feedkeys(":imap x\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"imap x<Bslash>k', @:)
+  iunmap x<Bslash>k
+  set cpo-=<
+  " Modifying 'cpo' above adds some default mappings, remove them
+  mapclear
+  mapclear!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab