search: use IFile.readNBytes(int)

Author: jukzi

bundles/org.eclipse.search.core/search/org/eclipse/search/internal/core/text/FileCharSequenceProvider.java

@@ -491,8 +491,8 @@ public String toString() {
 	 * get length
 	 */
 	private static String toShortString(IFile file) {
-		try (InputStream contents = file.getContents()) {
-			byte[] content = contents.readNBytes(MAX_BUFFER_LENGTH);
+		try {
+			byte[] content = file.readNBytes(MAX_BUFFER_LENGTH);
 			int length = content.length;
 			if (length >= MAX_BUFFER_LENGTH) {
 				return null;