Address comments

Author: fmeum

src/main/java/com/google/devtools/build/lib/analysis/FileProvider.java

@@ -57,7 +57,7 @@ public boolean isImmutable() {
 
   @Override
   public void debugPrint(Printer printer, StarlarkThread thread) {
-    printer.append("file_provider(files_to_build = ");
+    printer.append("FileProvider(files_to_build = ");
     printer.debugPrint(getFilesToBuildForStarlark(), thread);
     printer.append(")");
   }

src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java

@@ -1154,7 +1154,7 @@ String describeFingerprint(boolean digestAbsolutePaths) {
 
   @Override
   public void debugPrint(Printer printer, StarlarkThread thread) {
-    printer.append("runfiles(empty_files = ");
+    printer.append("Runfiles(empty_files = ");
     printer.debugPrint(getEmptyFilenamesForStarlark(), thread);
     printer.append(", files = ");
     printer.debugPrint(getArtifactsForStarlark(), thread);