runtime(syntax-tests): Add non-Latin-1 character filters for C syntax tests

See pull request #14767.

Rename the Vim :keymap filter files so they're, again, associated with
the correct dump files.

closes: #16560

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/syntax/testdir/dumps/vim_keymap_04.vim b/runtime/syntax/testdir/dumps/c_character_constant_00.vim
similarity index 65%
rename from runtime/syntax/testdir/dumps/vim_keymap_04.vim
rename to runtime/syntax/testdir/dumps/c_character_constant_00.vim
index 546837c..44191f8 100644
--- a/runtime/syntax/testdir/dumps/vim_keymap_04.vim
+++ b/runtime/syntax/testdir/dumps/c_character_constant_00.vim
@@ -1,2 +1,2 @@
 " Replace known non-Latin-1 characters.
-%s+[“�]+?+ge
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/vim_keymap_04.vim b/runtime/syntax/testdir/dumps/c_character_constant_01.vim
similarity index 65%
copy from runtime/syntax/testdir/dumps/vim_keymap_04.vim
copy to runtime/syntax/testdir/dumps/c_character_constant_01.vim
index 546837c..44191f8 100644
--- a/runtime/syntax/testdir/dumps/vim_keymap_04.vim
+++ b/runtime/syntax/testdir/dumps/c_character_constant_01.vim
@@ -1,2 +1,2 @@
 " Replace known non-Latin-1 characters.
-%s+[“�]+?+ge
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/vim_keymap_04.vim b/runtime/syntax/testdir/dumps/c_character_constant_02.vim
similarity index 65%
copy from runtime/syntax/testdir/dumps/vim_keymap_04.vim
copy to runtime/syntax/testdir/dumps/c_character_constant_02.vim
index 546837c..44191f8 100644
--- a/runtime/syntax/testdir/dumps/vim_keymap_04.vim
+++ b/runtime/syntax/testdir/dumps/c_character_constant_02.vim
@@ -1,2 +1,2 @@
 " Replace known non-Latin-1 characters.
-%s+[“�]+?+ge
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/vim_keymap_04.vim b/runtime/syntax/testdir/dumps/c_string_literal_00.vim
similarity index 65%
copy from runtime/syntax/testdir/dumps/vim_keymap_04.vim
copy to runtime/syntax/testdir/dumps/c_string_literal_00.vim
index 546837c..44191f8 100644
--- a/runtime/syntax/testdir/dumps/vim_keymap_04.vim
+++ b/runtime/syntax/testdir/dumps/c_string_literal_00.vim
@@ -1,2 +1,2 @@
 " Replace known non-Latin-1 characters.
-%s+[“�]+?+ge
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/vim_keymap_04.vim b/runtime/syntax/testdir/dumps/c_string_literal_01.vim
similarity index 65%
copy from runtime/syntax/testdir/dumps/vim_keymap_04.vim
copy to runtime/syntax/testdir/dumps/c_string_literal_01.vim
index 546837c..44191f8 100644
--- a/runtime/syntax/testdir/dumps/vim_keymap_04.vim
+++ b/runtime/syntax/testdir/dumps/c_string_literal_01.vim
@@ -1,2 +1,2 @@
 " Replace known non-Latin-1 characters.
-%s+[“�]+?+ge
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/vim_keymap_04.vim b/runtime/syntax/testdir/dumps/c_string_literal_02.vim
similarity index 65%
copy from runtime/syntax/testdir/dumps/vim_keymap_04.vim
copy to runtime/syntax/testdir/dumps/c_string_literal_02.vim
index 546837c..44191f8 100644
--- a/runtime/syntax/testdir/dumps/vim_keymap_04.vim
+++ b/runtime/syntax/testdir/dumps/c_string_literal_02.vim
@@ -1,2 +1,2 @@
 " Replace known non-Latin-1 characters.
-%s+[“�]+?+ge
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/vim_keymap_04.vim b/runtime/syntax/testdir/dumps/c_string_literal_03.vim
similarity index 65%
copy from runtime/syntax/testdir/dumps/vim_keymap_04.vim
copy to runtime/syntax/testdir/dumps/c_string_literal_03.vim
index 546837c..44191f8 100644
--- a/runtime/syntax/testdir/dumps/vim_keymap_04.vim
+++ b/runtime/syntax/testdir/dumps/c_string_literal_03.vim
@@ -1,2 +1,2 @@
 " Replace known non-Latin-1 characters.
-%s+[“�]+?+ge
+%s+[🍌猫�]+?+ge
diff --git a/runtime/syntax/testdir/dumps/vim9_keymap_01.vim b/runtime/syntax/testdir/dumps/vim9_ex_loadkeymap_01.vim
similarity index 100%
copy from runtime/syntax/testdir/dumps/vim9_keymap_01.vim
copy to runtime/syntax/testdir/dumps/vim9_ex_loadkeymap_01.vim
diff --git a/runtime/syntax/testdir/dumps/vim9_keymap_01.vim b/runtime/syntax/testdir/dumps/vim_ex_loadkeymap_01.vim
similarity index 100%
rename from runtime/syntax/testdir/dumps/vim9_keymap_01.vim
rename to runtime/syntax/testdir/dumps/vim_ex_loadkeymap_01.vim