Remove interior blank lines inside blockquote.

core/src/main/java/com/google/googlejavaformat/java/javadoc/JavadocFormatter.java

@@ -119,8 +119,8 @@ private static String render(List<Token> input, int blockIndent, boolean classic
         case HeaderOpenTag t -> output.writeHeaderOpen(t);
         case HeaderCloseTag t -> output.writeHeaderClose(t);
         case ParagraphOpenTag t -> output.writeParagraphOpen(standardizePToken(t));
-        case BlockquoteOpenTag t -> output.writeBlockquoteOpenOrClose(t);
-        case BlockquoteCloseTag t -> output.writeBlockquoteOpenOrClose(t);
+        case BlockquoteOpenTag t -> output.writeBlockquoteOpen(t);
+        case BlockquoteCloseTag t -> output.writeBlockquoteClose(t);
         case PreOpenTag t -> output.writePreOpen(t);
         case PreCloseTag t -> output.writePreClose(t);
         case CodeOpenTag t -> output.writeCodeOpen(t);

core/src/main/java/com/google/googlejavaformat/java/javadoc/JavadocWriter.java

@@ -23,6 +23,8 @@
 import static com.google.googlejavaformat.java.javadoc.JavadocWriter.RequestedWhitespace.NONE;
 import static com.google.googlejavaformat.java.javadoc.JavadocWriter.RequestedWhitespace.WHITESPACE;
 
+import com.google.googlejavaformat.java.javadoc.Token.BlockquoteCloseTag;
+import com.google.googlejavaformat.java.javadoc.Token.BlockquoteOpenTag;
 import com.google.googlejavaformat.java.javadoc.Token.BrTag;
 import com.google.googlejavaformat.java.javadoc.Token.CodeCloseTag;
 import com.google.googlejavaformat.java.javadoc.Token.CodeOpenTag;
@@ -259,13 +261,23 @@ void writeParagraphOpen(Token token) {
     writeToken(token);
   }
 
-  void writeBlockquoteOpenOrClose(Token token) {
+  void writeBlockquoteOpen(BlockquoteOpenTag token) {
     if (wroteAnythingSignificant) {
       requestBlankLine();
     }
 
     writeToken(token);
 
+    requestNewline();
+  }
+
+  void writeBlockquoteClose(BlockquoteCloseTag token) {
+    if (wroteAnythingSignificant) {
+      requestNewline();
+    }
+
+    writeToken(token);
+
     requestBlankLine();
   }
 

core/src/test/java/com/google/googlejavaformat/java/JavadocFormattingTest.java

@@ -716,7 +716,6 @@ class Test {}\
          * <blockquote>
          *
          * <p>def
-         *
          * </blockquote>
          *
          * ghi
@@ -2178,9 +2177,7 @@ class Test {}
     String expected =
         """
         /// <blockquote>
-        ///
         /// line 1 line 2
-        ///
         /// </blockquote>
         class Test {}
         """;