Fix another text block special case

Handle removing trailing whitespace when the closing delimiter is on the same line as the final line of the text block. Fixes #1205 PiperOrigin-RevId: 705218533

Author: cushon

core/src/main/java/com/google/googlejavaformat/java/StringWrapper.java

@@ -225,7 +225,9 @@ private void indentTextBlocks(
  }
  if (i == lines.size() - 1) {
  String withoutDelimiter =
- trimmed.substring(0, trimmed.length() - TEXT_BLOCK_DELIMITER.length());
+ trimmed
+ .substring(0, trimmed.length() - TEXT_BLOCK_DELIMITER.length())
+ .stripTrailing();
  if (!withoutDelimiter.stripLeading().isEmpty()) {
  output.append(withoutDelimiter).append('\\').append(separator).append(prefix);
  }

core/src/test/resources/com/google/googlejavaformat/java/testdata/I1205.input

@@ -0,0 +1,7 @@
+public interface Foo {
+
+ private static String foo =
+ """
+ foo\
+ bar """;
+}

core/src/test/resources/com/google/googlejavaformat/java/testdata/I1205.output

@@ -0,0 +1,8 @@
+public interface Foo {
+
+ private static String foo =
+ """
+ foo\
+ bar\
+ """;
+}