Migrate most of the assertions to Truth that the auto-migration tool did not catch.

IntelliJ's "replace structurally" command was surprisingly useful.

RELNOTES: None.
PiperOrigin-RevId: 157463734
diff --git a/src/test/java/com/google/devtools/build/lib/util/ResourceFileLoaderTest.java b/src/test/java/com/google/devtools/build/lib/util/ResourceFileLoaderTest.java
index d1e2889..0f00b75 100644
--- a/src/test/java/com/google/devtools/build/lib/util/ResourceFileLoaderTest.java
+++ b/src/test/java/com/google/devtools/build/lib/util/ResourceFileLoaderTest.java
@@ -14,15 +14,13 @@
 package com.google.devtools.build.lib.util;
 
 import static com.google.common.truth.Truth.assertThat;
-import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
+import java.io.IOException;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
-import java.io.IOException;
-
 /**
  * A test for {@link ResourceFileLoader}.
  */
@@ -33,7 +31,7 @@
   public void loader() throws IOException {
     String message = ResourceFileLoader.loadResource(
         ResourceFileLoaderTest.class, "ResourceFileLoaderTest.message");
-    assertEquals("Hello, world.", message);
+    assertThat(message).isEqualTo("Hello, world.");
   }
 
   @Test