Fix a bug where leading whitespace was removed from the last line of a text block

If the last line contains contents other than the closing delimiter, it may have significant leading whitespace. This change prevents that whitespace from being removed. #1195 PiperOrigin-RevId: 698939557

Author: cushon

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

@@ -219,7 +219,7 @@ private void indentTextBlocks(
  StringBuilder output = new StringBuilder(initialLines.get(0).stripLeading());
  for (int i = 0; i < lines.size(); i++) {
  String line = lines.get(i);
- String trimmed = line.stripLeading().stripTrailing();
+ String trimmed = line.stripTrailing();
  output.append(separator);
  if (!trimmed.isEmpty()) {
  // Don't add incidental leading whitespace to empty lines
@@ -228,7 +228,7 @@ private void indentTextBlocks(
  if (i == lines.size() - 1) {
  String withoutDelimiter =
  trimmed.substring(0, trimmed.length() - TEXT_BLOCK_DELIMITER.length());
- if (!withoutDelimiter.isEmpty()) {
+ if (!withoutDelimiter.stripLeading().isEmpty()) {
  output.append(withoutDelimiter).append('\\').append(separator).append(prefix);
  }
  // If the trailing line is just """, indenting it more than the prefix of incidental

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

@@ -57,7 +57,8 @@ public class FormatterIntegrationTest {
  "ExpressionSwitch",
  "I574",
  "I594",
- "SwitchComment")
+ "SwitchComment",
+ "B380299722")
  .putAll(15, "I603")
  .putAll(16, "I588", "Sealed")
  .putAll(17, "I683", "I684", "I696")

core/src/test/resources/com/google/googlejavaformat/java/testdata/B380299722.input

@@ -0,0 +1,9 @@
+package com.helloworld;
+
+class Foo {
+ void foo() {
+ var bar = """
+ bar\
+ bar""";
+ }
+}

core/src/test/resources/com/google/googlejavaformat/java/testdata/B380299722.output

@@ -0,0 +1,11 @@
+package com.helloworld;
+
+class Foo {
+ void foo() {
+ var bar =
+ """
+ bar\
+ bar\
+ """;
+ }
+}