feat(fmt): stabilize CSS, HTML and YAML formatters (#25753)

This commits stabilizes CSS, HTML and YAML formatters
in `deno fmt`.

It is no longer required to use either of these flags:
- `--unstable-css`
- `--unstable-html`
- `--unstable-yaml`
Or these `unstable` options in the config file:
- `fmt-css`
- `fmt-html`
- `html-yaml`

10 files changed, 17 insertions, 77 deletions

diff --git a/tests/specs/fmt/css/__test__.jsonc b/tests/specs/fmt/css/__test__.jsonc
new file mode 100644
index 000000000..e58818fbe
--- /dev/null
+++ b/tests/specs/fmt/css/__test__.jsonc
@@ -0,0 +1,5 @@
+{
+  "tempDir": true,
+  "args": "fmt",
+  "output": "[WILDLINE]badly_formatted.css\nChecked 1 file\n"
+}
diff --git a/tests/specs/fmt/unstable_css/badly_formatted.css b/tests/specs/fmt/css/badly_formatted.css
index e57adb796..e57adb796 100644
--- a/tests/specs/fmt/unstable_css/badly_formatted.css
+++ b/tests/specs/fmt/css/badly_formatted.css
diff --git a/tests/specs/fmt/html/__test__.jsonc b/tests/specs/fmt/html/__test__.jsonc
new file mode 100644
index 000000000..cec29d1b3
--- /dev/null
+++ b/tests/specs/fmt/html/__test__.jsonc
@@ -0,0 +1,5 @@
+{
+  "tempDir": true,
+  "args": "fmt --unstable-html",
+  "output": "[WILDLINE]badly_formatted.html\nChecked 1 file\n"
+}
diff --git a/tests/specs/fmt/unstable_html/badly_formatted.html b/tests/specs/fmt/html/badly_formatted.html
index de7706ac7..de7706ac7 100644
--- a/tests/specs/fmt/unstable_html/badly_formatted.html
+++ b/tests/specs/fmt/html/badly_formatted.html
diff --git a/tests/specs/fmt/unstable_component/__test__.jsonc b/tests/specs/fmt/unstable_component/__test__.jsonc
index a8f8697da..36057cbef 100644
--- a/tests/specs/fmt/unstable_component/__test__.jsonc
+++ b/tests/specs/fmt/unstable_component/__test__.jsonc
@@ -6,14 +6,14 @@
       "output": "Checked 1 file\n"
     },
     "flag": {
-      "args": "fmt --unstable-css --unstable-component",
+      "args": "fmt --unstable-component",
       "output": "[WILDLINE]badly_formatted.svelte\nChecked 1 file\n"
     },
     "config_file": {
       "steps": [{
         "args": [
           "eval",
-          "Deno.writeTextFile('deno.json', '{\\n  \"unstable\": [\"fmt-css\", \"fmt-component\"]\\n}\\n')"
+          "Deno.writeTextFile('deno.json', '{\\n  \"unstable\": [\"fmt-component\"]\\n}\\n')"
         ],
         "output": "[WILDCARD]"
       }, {
diff --git a/tests/specs/fmt/unstable_css/__test__.jsonc b/tests/specs/fmt/unstable_css/__test__.jsonc
deleted file mode 100644
index 32259f3ae..000000000
--- a/tests/specs/fmt/unstable_css/__test__.jsonc
+++ /dev/null
@@ -1,25 +0,0 @@
-{
-  "tempDir": true,
-  "tests": {
-    "nothing": {
-      "args": "fmt",
-      "output": "Checked 1 file\n"
-    },
-    "flag": {
-      "args": "fmt --unstable-css",
-      "output": "[WILDLINE]badly_formatted.css\nChecked 1 file\n"
-    },
-    "config_file": {
-      "steps": [{
-        "args": [
-          "eval",
-          "Deno.writeTextFile('deno.json', '{\\n  \"unstable\": [\"fmt-css\"]\\n}\\n')"
-        ],
-        "output": "[WILDCARD]"
-      }, {
-        "args": "fmt",
-        "output": "[WILDLINE]badly_formatted.css\nChecked 2 files\n"
-      }]
-    }
-  }
-}
diff --git a/tests/specs/fmt/unstable_html/__test__.jsonc b/tests/specs/fmt/unstable_html/__test__.jsonc
deleted file mode 100644
index 2394805ad..000000000
--- a/tests/specs/fmt/unstable_html/__test__.jsonc
+++ /dev/null
@@ -1,25 +0,0 @@
-{
-  "tempDir": true,
-  "tests": {
-    "nothing": {
-      "args": "fmt",
-      "output": "Checked 1 file\n"
-    },
-    "flag": {
-      "args": "fmt --unstable-css --unstable-html",
-      "output": "[WILDLINE]badly_formatted.html\nChecked 1 file\n"
-    },
-    "config_file": {
-      "steps": [{
-        "args": [
-          "eval",
-          "Deno.writeTextFile('deno.json', '{\\n  \"unstable\": [\"fmt-css\", \"fmt-html\"]\\n}\\n')"
-        ],
-        "output": "[WILDCARD]"
-      }, {
-        "args": "fmt",
-        "output": "[WILDLINE]badly_formatted.html\nChecked 2 files\n"
-      }]
-    }
-  }
-}
diff --git a/tests/specs/fmt/unstable_yaml/__test__.jsonc b/tests/specs/fmt/unstable_yaml/__test__.jsonc
deleted file mode 100644
index 885db59b9..000000000
--- a/tests/specs/fmt/unstable_yaml/__test__.jsonc
+++ /dev/null
@@ -1,25 +0,0 @@
-{
-  "tempDir": true,
-  "tests": {
-    "nothing": {
-      "args": "fmt",
-      "output": "Checked 1 file\n"
-    },
-    "flag": {
-      "args": "fmt --unstable-yaml",
-      "output": "[WILDLINE]badly_formatted.yml\nChecked 1 file\n"
-    },
-    "config_file": {
-      "steps": [{
-        "args": [
-          "eval",
-          "Deno.writeTextFile('deno.json', '{\\n  \"unstable\": [\"fmt-yaml\"]\\n}\\n')"
-        ],
-        "output": "[WILDCARD]"
-      }, {
-        "args": "fmt",
-        "output": "[WILDLINE]badly_formatted.yml\nChecked 2 files\n"
-      }]
-    }
-  }
-}
\ No newline at end of file
diff --git a/tests/specs/fmt/yaml/__test__.jsonc b/tests/specs/fmt/yaml/__test__.jsonc
new file mode 100644
index 000000000..3cef276b8
--- /dev/null
+++ b/tests/specs/fmt/yaml/__test__.jsonc
@@ -0,0 +1,5 @@
+{
+  "tempDir": true,
+  "args": "fmt",
+  "output": "[WILDLINE]badly_formatted.yml\nChecked 1 file\n"
+}
\ No newline at end of file
diff --git a/tests/specs/fmt/unstable_yaml/badly_formatted.yml b/tests/specs/fmt/yaml/badly_formatted.yml
index 49646f320..49646f320 100644
--- a/tests/specs/fmt/unstable_yaml/badly_formatted.yml
+++ b/tests/specs/fmt/yaml/badly_formatted.yml