first commit

wp/wp-includes/blocks/heading/block.json

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+{
+	"$schema": "https://schemas.wp.org/trunk/block.json",
+	"apiVersion": 2,
+	"name": "core/heading",
+	"title": "Heading",
+	"category": "text",
+	"description": "Introduce new sections and organize content to help visitors (and search engines) understand the structure of your content.",
+	"keywords": [ "title", "subtitle" ],
+	"textdomain": "default",
+	"attributes": {
+		"textAlign": {
+			"type": "string"
+		},
+		"content": {
+			"type": "string",
+			"source": "html",
+			"selector": "h1,h2,h3,h4,h5,h6",
+			"default": "",
+			"__experimentalRole": "content"
+		},
+		"level": {
+			"type": "number",
+			"default": 2
+		},
+		"placeholder": {
+			"type": "string"
+		}
+	},
+	"supports": {
+		"align": [ "wide", "full" ],
+		"anchor": true,
+		"className": true,
+		"color": {
+			"gradients": true,
+			"link": true,
+			"__experimentalDefaultControls": {
+				"background": true,
+				"text": true
+			}
+		},
+		"spacing": {
+			"margin": true,
+			"padding": true
+		},
+		"typography": {
+			"fontSize": true,
+			"lineHeight": true,
+			"__experimentalFontFamily": true,
+			"__experimentalFontStyle": true,
+			"__experimentalFontWeight": true,
+			"__experimentalLetterSpacing": true,
+			"__experimentalTextTransform": true,
+			"__experimentalTextDecoration": true,
+			"__experimentalDefaultControls": {
+				"fontSize": true,
+				"fontAppearance": true,
+				"textTransform": true
+			}
+		},
+		"__unstablePasteTextInline": true,
+		"__experimentalSlashInserter": true
+	},
+	"editorStyle": "wp-block-heading-editor",
+	"style": "wp-block-heading"
+}

wp/wp-includes/blocks/heading/style-rtl.css

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+h1.has-background,h2.has-background,h3.has-background,h4.has-background,h5.has-background,h6.has-background{
+  padding:1.25em 2.375em;
+}

wp/wp-includes/blocks/heading/style-rtl.min.css

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+h1.has-background,h2.has-background,h3.has-background,h4.has-background,h5.has-background,h6.has-background{padding:1.25em 2.375em}

wp/wp-includes/blocks/heading/style.css

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+h1.has-background,h2.has-background,h3.has-background,h4.has-background,h5.has-background,h6.has-background{
+  padding:1.25em 2.375em;
+}

wp/wp-includes/blocks/heading/style.min.css

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+h1.has-background,h2.has-background,h3.has-background,h4.has-background,h5.has-background,h6.has-background{padding:1.25em 2.375em}