Add Blockquote element.

Sources/Slipstream/Documentation.docc/W3C/W3CViews.md

@@ -35,6 +35,7 @@ The complete W3C HTML elements standard can be found [here](https://html.spec.wh
 
 - ``Paragraph``
 - ``Divider``
+- ``Blockquote``
 - ``Div``
 
 ### Text-level semantics

Sources/Slipstream/W3C/Elements/GroupingContent/Blockquote.swift

@@ -0,0 +1,35 @@
+/// A view that represents a section that is quoted from another source.
+///
+/// ```swift
+/// struct MySiteContent: View {
+///   var body: some View {
+///     Body {
+///       Blockquote {
+///         Text("Hello, world!")
+///       }
+///     }
+///   }
+/// }
+/// ```
+///
+/// - SeeAlso: W3C [blockquote](https://html.spec.whatwg.org/multipage/grouping-content.html#the-blockquote-element) specification.
+@available(iOS 17.0, macOS 14.0, *)
+public struct Blockquote<Content>: W3CElement where Content: View {
+  @_documentation(visibility: private)
+  public let tagName: String = "blockquote"
+
+  @_documentation(visibility: private)
+  @ViewBuilder public let content: () -> Content
+
+  /// Creates a blockquote.
+  public init(@ViewBuilder content: @escaping () -> Content) {
+    self.content = content
+  }
+
+  /// Creates a blockquote with some static text.
+  public init(_ text: String) where Content == Text {
+    self.content = {
+      Text(text)
+    }
+  }
+}

Sources/Slipstream/W3C/Elements/GroupingContent/Paragraph.swift

@@ -24,7 +24,7 @@ public struct Paragraph<Content>: W3CElement where Content: View {
     self.content = content
   }
 
-  /// Creates an paragraph with some static text.
+  /// Creates a paragraph with some static text.
   public init(_ text: String) where Content == Text {
     self.content = {
       Text(text)

Tests/SlipstreamTests/W3C/BlockquoteTests.swift

@@ -0,0 +1,19 @@
+import Testing
+
+import Slipstream
+
+struct BlockquoteTests {
+  @Test func emptyBlock() throws {
+    try #expect(renderHTML(Blockquote {}) == "<blockquote></blockquote>")
+  }
+
+  @Test func withText() throws {
+    try #expect(renderHTML(Blockquote {
+      Text("Hello, world!")
+    }) == """
+<blockquote>
+ Hello, world!
+</blockquote>
+""")
+  }
+}