Use Files.exists, make code more consistent

* Use java.nio.file.Files.exists to be consistent
* Use empty empty EditorConfigDefaults settings for KtLint 0.47 and 0.48
  when possible

Author: eirnym

lib/src/compatKtLint0Dot47Dot0/java/com/diffplug/spotless/glue/ktlint/compat/KtLintCompat0Dot47Dot0Adapter.java

@@ -17,6 +17,7 @@
 
 import static java.util.Collections.emptySet;
 
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.LinkedHashSet;
@@ -77,6 +78,13 @@ public String format(final String text, Path path, final boolean isScript,
 					editorConfigOverrideMap);
 		}
 
+		EditorConfigDefaults editorConfig;
+		if (editorConfigPath == null || !Files.exists(editorConfigPath)) {
+			editorConfig = EditorConfigDefaults.Companion.getEmptyEditorConfigDefaults();
+		} else {
+			editorConfig = EditorConfigDefaults.Companion.load(editorConfigPath);
+		}
+
 		return KtLint.INSTANCE.format(new KtLint.ExperimentalParams(
 				path.toFile().getAbsolutePath(),
 				text,
@@ -87,7 +95,7 @@ public String format(final String text, Path path, final boolean isScript,
 				isScript,
 				null,
 				false,
-				EditorConfigDefaults.Companion.load(editorConfigPath),
+				editorConfig,
 				editorConfigOverride,
 				false));
 	}

lib/src/compatKtLint0Dot48Dot0/java/com/diffplug/spotless/glue/ktlint/compat/KtLintCompat0Dot48Dot0Adapter.java

@@ -15,9 +15,10 @@
  */
 package com.diffplug.spotless.glue.ktlint.compat;
 
+import java.nio.file.Path;
+import java.nio.file.Files;
 import java.util.ArrayList;
 import java.util.Collections;
-import java.nio.file.Path;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
@@ -99,7 +100,7 @@ public String format(final String text, Path path, final boolean isScript,
 					editorConfigOverrideMap);
 		}
 		EditorConfigDefaults editorConfig;
-		if (editorConfigPath == null || !editorConfigPath.toFile().exists()) {
+		if (editorConfigPath == null || !Files.exists(editorConfigPath)) {
 			editorConfig = EditorConfigDefaults.Companion.getEMPTY_EDITOR_CONFIG_DEFAULTS();
 		} else {
 			editorConfig = EditorConfigDefaults.Companion.load(editorConfigPath);

lib/src/testCompatKtLint0Dot48Dot0/java/com/diffplug/spotless/glue/ktlint/compat/KtLintCompat0Dot48Dot0AdapterTest.java

@@ -17,7 +17,6 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;