Fix stack overflow when whitespace appears after attribute name and before tag-closing >

Sources/HTMLStreamer/Tokenizer.swift

@@ -731,7 +731,7 @@ private extension Tokenizer {
         switch c {
         case "\t", "\n", "\u{000C}", " ":
             // ignore the character
-            return next()
+            return tokenizeBeforeAttributeName()
         case "/", ">", nil:
             reconsume(c)
             state = .afterAttributeName
@@ -794,13 +794,16 @@ private extension Tokenizer {
         switch nextChar() {
         case "\t", "\n", "\u{000C}", " ":
             // ignore the character
-            return tokenizeAttributeName()
+            return tokenizeAfterAttributeName()
         case "/":
             state = .selfClosingStartTag
             return tokenizeSelfClosingStartTag()
         case "=":
             state = .beforeAttributeValue
             return tokenizeBeforeAttributeValue()
+        case ">":
+            state = .data
+            return takeCurrentToken()
         case nil:
             // parse error: eof-in-tag
             state = .endOfFile

Tests/HTMLStreamerTests/TokenizerTests.swift

@@ -74,6 +74,10 @@ final class TokenizerTests: XCTestCase {
         XCTAssertEqual(tokenize("🇺🇸"), [.characterSequence("\u{1F1FA}\u{1F1F8}")])
     }
     
+    func testWhitespaceAfterAttributeName() {
+        XCTAssertEqual(tokenize("<a foo >"), [.startTag("a", selfClosing: false, attributes: [.init(name: "foo", value: "")])])
+    }
+    
 }
 
 private struct PrintIterator<Inner: IteratorProtocol>: IteratorProtocol {