Don't quibble over trailing newlines.

core/src/main/java/com/google/errorprone/bugpatterns/MisformattedTestData.java

@@ -75,7 +75,7 @@ public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState
     } catch (FormatterException exception) {
       return NO_MATCH;
     }
-    if (formattedSource.equals(sourceValue)) {
+    if (formattedSource.trim().equals(((String) sourceValue).trim())) {
       return NO_MATCH;
     }
     // This is a bit crude: but tokenize between the comma and the 2nd argument in order to work out

core/src/test/java/com/google/errorprone/bugpatterns/MisformattedTestDataTest.java

@@ -61,6 +61,34 @@ void method() {
         .doTest();
   }
 
+  @Test
+  public void onlyDiffersByFinalNewline_noFinding() {
+    assume().that(Runtime.version().feature()).isAtLeast(14);
+
+    compilationHelper
+        .addSourceLines(
+            "Test.java",
+            """
+            import com.google.errorprone.BugCheckerRefactoringTestHelper;
+
+            class Test {
+              void method(BugCheckerRefactoringTestHelper h) {
+                h.addInputLines(
+                    "Test.java",
+                    \"""
+                    package foo;
+
+                    class Test {
+                      void method() {
+                        int a = 1;
+                      }
+                    }\""");
+              }
+            }
+            """)
+        .doTest();
+  }
+
   @Test
   public void misformatted_suggestsFix() {
     assume().that(Runtime.version().feature()).isAtLeast(14);