Don't try to reflow text blocks

Fixes #976

PiperOrigin-RevId: 577249036

Author: cushon

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

@@ -15,6 +15,7 @@
 package com.google.googlejavaformat.java;
 
 import static com.google.common.collect.Iterables.getLast;
+import static java.lang.Math.min;
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static java.util.stream.Collectors.joining;
 
@@ -122,6 +123,10 @@ public Void visitLiteral(LiteralTree literalTree, Void aVoid) {
         if (literalTree.getKind() != Kind.STRING_LITERAL) {
           return null;
         }
+        int pos = getStartPosition(literalTree);
+        if (input.substring(pos, min(input.length(), pos + 3)).equals("\"\"\"")) {
+          return null;
+        }
         Tree parent = getCurrentPath().getParentPath().getLeaf();
         if (parent instanceof MemberSelectTree
             && ((MemberSelectTree) parent).getExpression().equals(literalTree)) {

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

@@ -15,6 +15,7 @@
 package com.google.googlejavaformat.java;
 
 import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assume.assumeTrue;
 
 import com.google.common.base.Joiner;
 import org.junit.Test;
@@ -52,6 +53,26 @@ public void testAwkwardLineEndWrapping() throws Exception {
     assertThat(StringWrapper.wrap(100, input, new Formatter())).isEqualTo(output);
   }
 
+  @Test
+  public void textBlock() throws Exception {
+    assumeTrue(Runtime.version().feature() >= 15);
+    String input =
+        lines(
+            "package com.mypackage;",
+            "public class ReproBug {",
+            "    private String myString;",
+            "    private ReproBug() {",
+            "        String str =",
+            "                \"\"\"",
+            "               "
+                + " {\"sourceEndpoint\":\"ri.something.1-1.object-internal.1\",\"targetEndpoint\":\"ri.some"
+                + "thing.1-1.object-internal.2\",\"typeId\":\"typeId\"}\"\"\";",
+            "        myString = str;",
+            "    }",
+            "}");
+    assertThat(StringWrapper.wrap(100, input, new Formatter())).isEqualTo(input);
+  }
+
   private static String lines(String... line) {
     return Joiner.on('\n').join(line) + '\n';
   }