8258916: javac/doclint reports broken HTML on multiline mailto links

Reviewed-by: jlaskey, iris

Author: jonathan-gibbons

src/jdk.compiler/share/classes/com/sun/tools/javac/parser/DocCommentParser.java

@@ -917,6 +917,7 @@ protected List<DCTree> htmlAttrs() {
                 nextChar();
                 skipWhitespace();
                 if (ch == '\'' || ch == '"') {
+                    newline = false;
                     vkind = (ch == '\'') ? ValueKind.SINGLE : ValueKind.DOUBLE;
                     char quote = ch;
                     nextChar();

test/langtools/tools/doclint/HtmlAttrsTest.java

@@ -1,6 +1,6 @@
 /*
  * @test /nodynamiccopyright/
- * @bug 8004832
+ * @bug 8004832 8258916
  * @summary Add new doclint package
  * @modules jdk.javadoc/jdk.javadoc.internal.doclint
  * @build DocLintTester
@@ -24,5 +24,11 @@ public void obsolete() { }
      * <font size="3"> text </font>
      */
     public void obsolete_use_css() { }
+
+    /**
+     * multi-line mailto <a
+     * href="mailto:nobody@example.com">nobody</a>
+     */
+    public void multiline_mailto() { }
 }