Bump all nvim-specific error codes above E5000

In order to not conflict with new error codes that Vim adds, all Neovim
error codes should be above 5000.  The three existing sub-5000 error
codes (E926, E951, and E952) are now E50003, E5004, and E5005
respectively.

E953 was removed in 6167ce6df2753d5474ad49aea19f5957128ab015, so just
remove it from the help.

7 files changed, 19 insertions, 19 deletions

diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index eecf12c44e..64f58c5599 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -5069,7 +5069,7 @@ msgpackdump({list})				   {Nvim} *msgpackdump()*
 		(dictionary with zero items is represented by 0x80 byte in
 		messagepack).
 
-		Limitations:				*E951* *E952* *E953*
+		Limitations:				*E5004* *E5005*
 		1. |Funcref|s cannot be dumped.
 		2. Containers that reference themselves cannot be dumped.
 		3. Dictionary keys are always dumped as STR strings.
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 1789f73aa9..9d8d1f84c8 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -6512,7 +6512,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 				     *'ttyfast'* *'tf'* *'nottyfast'* *'notf'*
 'ttyfast' 'tf'		Removed. |vim-differences| {Nvim}
 
-						*'undodir'* *'udir'* *E926*
+						*'undodir'* *'udir'* *E5003*
 'undodir' 'udir'	string	(default "$XDG_DATA_HOME/nvim/undo")
 			global
 			{only when compiled with the |+persistent_undo| feature}
diff --git a/src/nvim/eval/encode.c b/src/nvim/eval/encode.c
index 670437ceda..f6c58d8562 100644
--- a/src/nvim/eval/encode.c
+++ b/src/nvim/eval/encode.c
@@ -836,7 +836,7 @@ char *encode_tv2json(typval_T *tv, size_t *len)
     msgpack_pack_double(packer, (double) (flt))
 
 #define TYPVAL_ENCODE_CONV_FUNC(fun) \
-    return conv_error(_("E951: Error while dumping %s, %s: " \
+    return conv_error(_("E5004: Error while dumping %s, %s: " \
                         "attempt to dump function reference"), \
                       mpstack, objname)
 
@@ -880,7 +880,7 @@ char *encode_tv2json(typval_T *tv, size_t *len)
 #define TYPVAL_ENCODE_CONV_LIST_BETWEEN_ITEMS()
 
 #define TYPVAL_ENCODE_CONV_RECURSE(val, conv_type) \
-    return conv_error(_("E952: Unable to dump %s: " \
+    return conv_error(_("E5005: Unable to dump %s: " \
                         "container references itself in %s"), \
                       mpstack, objname)
 
diff --git a/src/nvim/undo.c b/src/nvim/undo.c
index d6428d63f7..4d56046bc1 100644
--- a/src/nvim/undo.c
+++ b/src/nvim/undo.c
@@ -691,7 +691,7 @@ char *u_get_undo_file_name(const char *const buf_ffname, const bool reading)
         int ret;
         char *failed_dir;
         if ((ret = os_mkdir_recurse(dir_name, 0755, &failed_dir)) != 0) {
-          EMSG3(_("E926: Unable to create directory \"%s\" for undo file: %s"),
+          EMSG3(_("E5003: Unable to create directory \"%s\" for undo file: %s"),
                 failed_dir, os_strerror(ret));
           xfree(failed_dir);
         } else {
diff --git a/test/functional/eval/msgpack_functions_spec.lua b/test/functional/eval/msgpack_functions_spec.lua
index f11c08de05..ebe7c5492b 100644
--- a/test/functional/eval/msgpack_functions_spec.lua
+++ b/test/functional/eval/msgpack_functions_spec.lua
@@ -566,27 +566,27 @@ describe('msgpackdump() function', function()
 
   it('fails to dump a function reference', function()
     execute('let Todump = function("tr")')
-    eq('Vim(call):E951: Error while dumping msgpackdump() argument, index 0, itself: attempt to dump function reference',
+    eq('Vim(call):E5004: Error while dumping msgpackdump() argument, index 0, itself: attempt to dump function reference',
        exc_exec('call msgpackdump([Todump])'))
   end)
 
   it('fails to dump a function reference in a list', function()
     execute('let todump = [function("tr")]')
-    eq('Vim(call):E951: Error while dumping msgpackdump() argument, index 0, index 0: attempt to dump function reference',
+    eq('Vim(call):E5004: Error while dumping msgpackdump() argument, index 0, index 0: attempt to dump function reference',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive list', function()
     execute('let todump = [[[]]]')
     execute('call add(todump[0][0], todump)')
-    eq('Vim(call):E952: Unable to dump msgpackdump() argument, index 0: container references itself in index 0, index 0, index 0',
+    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 0, index 0, index 0',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive dict', function()
     execute('let todump = {"d": {"d": {}}}')
     execute('call extend(todump.d.d, {"d": todump})')
-    eq('Vim(call):E952: Unable to dump msgpackdump() argument, index 0: container references itself in key \'d\', key \'d\', key \'d\'',
+    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key \'d\', key \'d\', key \'d\'',
        exc_exec('call msgpackdump([todump])'))
   end)
 
@@ -605,35 +605,35 @@ describe('msgpackdump() function', function()
   it('fails to dump a recursive list in a special dict', function()
     execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
     execute('call add(todump._VAL, todump)')
-    eq('Vim(call):E952: Unable to dump msgpackdump() argument, index 0: container references itself in index 0',
+    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 0',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive (key) map in a special dict', function()
     execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
     execute('call add(todump._VAL, [todump, 0])')
-    eq('Vim(call):E952: Unable to dump msgpackdump() argument, index 0: container references itself in index 1',
+    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 1',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive (val) map in a special dict', function()
     execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
     execute('call add(todump._VAL, [0, todump])')
-    eq('Vim(call):E952: Unable to dump msgpackdump() argument, index 0: container references itself in key 0 at index 0 from special map',
+    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key 0 at index 0 from special map',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive (key) map in a special dict, _VAL reference', function()
     execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[[], []]]}')
     execute('call add(todump._VAL[0][0], todump._VAL)')
-    eq('Vim(call):E952: Unable to dump msgpackdump() argument, index 0: container references itself in key [[[[...@0], []]]] at index 0 from special map, index 0',
+    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key [[[[...@0], []]]] at index 0 from special map, index 0',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive (val) map in a special dict, _VAL reference', function()
     execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[[], []]]}')
     execute('call add(todump._VAL[0][1], todump._VAL)')
-    eq('Vim(call):E952: Unable to dump msgpackdump() argument, index 0: container references itself in key [] at index 0 from special map, index 0',
+    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key [] at index 0 from special map, index 0',
        exc_exec('call msgpackdump([todump])'))
   end)
 
@@ -641,7 +641,7 @@ describe('msgpackdump() function', function()
   function()
     execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
     execute('call add(todump._VAL, [0, todump._VAL])')
-    eq('Vim(call):E952: Unable to dump msgpackdump() argument, index 0: container references itself in index 0, index 1',
+    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 0, index 1',
        exc_exec('call msgpackdump([todump])'))
   end)
 
diff --git a/test/functional/shada/errors_spec.lua b/test/functional/shada/errors_spec.lua
index 98ead6cc3d..19f35571d7 100644
--- a/test/functional/shada/errors_spec.lua
+++ b/test/functional/shada/errors_spec.lua
@@ -497,7 +497,7 @@ $
   it('errors when a funcref is stored in a variable', function()
     nvim_command('let F = function("tr")')
     nvim_command('set shada+=!')
-    eq('\nE951: Error while dumping variable g:F, itself: attempt to dump function reference'
+    eq('\nE5004: Error while dumping variable g:F, itself: attempt to dump function reference'
        .. '\nE574: Failed to write variable F',
        redir_exec('wshada'))
   end)
@@ -506,7 +506,7 @@ $
     nvim_command('let L = []')
     nvim_command('call add(L, L)')
     nvim_command('set shada+=!')
-    eq('\nE952: Unable to dump variable g:L: container references itself in index 0'
+    eq('\nE5005: Unable to dump variable g:L: container references itself in index 0'
        .. '\nE574: Failed to write variable L',
        redir_exec('wshada'))
   end)
diff --git a/test/functional/shada/variables_spec.lua b/test/functional/shada/variables_spec.lua
index 15502f0b71..a420462437 100644
--- a/test/functional/shada/variables_spec.lua
+++ b/test/functional/shada/variables_spec.lua
@@ -132,7 +132,7 @@ describe('ShaDa support code', function()
     meths.set_var('U', '10')
     nvim_command('set shada+=!')
     set_additional_cmd('set shada+=!')
-    eq('Vim(wshada):E951: Error while dumping variable g:F, itself: attempt to dump function reference',
+    eq('Vim(wshada):E5004: Error while dumping variable g:F, itself: attempt to dump function reference',
        exc_exec('wshada'))
     meths.set_option('shada', '')
     reset()
@@ -145,7 +145,7 @@ describe('ShaDa support code', function()
     nvim_command('call add(L, L)')
     meths.set_var('U', '10')
     nvim_command('set shada+=!')
-    eq('Vim(wshada):E952: Unable to dump variable g:L: container references itself in index 0',
+    eq('Vim(wshada):E5005: Unable to dump variable g:L: container references itself in index 0',
        exc_exec('wshada'))
     meths.set_option('shada', '')
     set_additional_cmd('set shada+=!')