fix(excmd): append original command to error message

Revert the change to do_cmdline_cmd() from #5226.

This function is used in many places, so making it different from Vim
leads to small differences from Vim in the behavior of some functions
like execute() and assert_fails(). If DOCMD_VERBOSE really needs to be
removed somewhere, a do_cmdline() call without DOCMD_VERBOSE is also
shorter than a do_cmdline() call with DOCMD_VERBOSE.

src/nvim/ex_docmd.c

@@ -288,7 +288,7 @@ static void msg_verbose_cmd(linenr_T lnum, char *cmd)
 /// Execute a simple command line.  Used for translated commands like "*".
 int do_cmdline_cmd(const char *cmd)
 {
-  return do_cmdline((char *)cmd, NULL, NULL, DOCMD_NOWAIT|DOCMD_KEYTYPED);
+  return do_cmdline((char *)cmd, NULL, NULL, DOCMD_VERBOSE|DOCMD_NOWAIT|DOCMD_KEYTYPED);
 }
 
 /// do_cmdline(): execute one Ex command line
@@ -1862,7 +1862,8 @@ static bool skip_cmd(const exarg_T *eap)
 
 /// Execute one Ex command.
 ///
-/// If 'sourcing' is true, the command will be included in the error message.
+/// If "flags" has DOCMD_VERBOSE, the command will be included in the error
+/// message.
 ///
 /// 1. skip comment lines and leading space
 /// 2. handle command modifiers

test/functional/ex_cmds/excmd_spec.lua

@@ -11,20 +11,24 @@ describe('Ex cmds', function()
     clear()
   end)
 
+  local function check_excmd_err(cmd, err)
+    eq(err .. ': ' .. cmd, pcall_err(command, cmd))
+  end
+
   it('handle integer overflow from user-input #5555', function()
     command(':9999999999999999999999999999999999999999')
     command(':later 9999999999999999999999999999999999999999')
     command(':echo expand("#<9999999999999999999999999999999999999999")')
     command(':lockvar 9999999999999999999999999999999999999999')
     command(':winsize 9999999999999999999999999999999999999999 9999999999999999999999999999999999999999')
-    eq('Vim(tabnext):E475: Invalid argument: 9999999999999999999999999999999999999999',
+    check_excmd_err(':tabnext 9999999999999999999999999999999999999999',
-      pcall_err(command, ':tabnext 9999999999999999999999999999999999999999'))
+                    'Vim(tabnext):E475: Invalid argument: 9999999999999999999999999999999999999999')
-    eq('Vim(Next):E939: Positive count required',
+    check_excmd_err(':N 9999999999999999999999999999999999999999',
-      pcall_err(command, ':N 9999999999999999999999999999999999999999'))
+                    'Vim(Next):E939: Positive count required')
+    check_excmd_err(':bdelete 9999999999999999999999999999999999999999',
+                    'Vim(bdelete):E939: Positive count required')
     eq('Vim(menu):E329: No menu "9999999999999999999999999999999999999999"',
       pcall_err(command, ':menu 9999999999999999999999999999999999999999'))
-    eq('Vim(bdelete):E939: Positive count required',
-      pcall_err(command, ':bdelete 9999999999999999999999999999999999999999'))
     assert_alive()
   end)
 

test/functional/lua/commands_spec.lua

@@ -214,7 +214,7 @@ describe(':luado command', function()
   end)
   it('fails in sandbox when needed', function()
     curbufmeths.set_lines(0, 1, false, {"ABC", "def", "gHi"})
-    eq('Vim(luado):E48: Not allowed in sandbox',
+    eq('Vim(luado):E48: Not allowed in sandbox: sandbox luado runs = (runs or 0) + 1',
        pcall_err(command, 'sandbox luado runs = (runs or 0) + 1'))
     eq(NIL, funcs.luaeval('runs'))
   end)

test/functional/ui/inccommand_spec.lua

@@ -1720,7 +1720,7 @@ describe("'inccommand' and :cnoremap", function()
 
   local function refresh(case, visual)
     clear()
-    screen = visual and Screen.new(50,10) or nil
+    screen = visual and Screen.new(80,10) or nil
     common_setup(screen, case, default_text)
   end