changed to using super.

dcli_core/lib/src/functions/backup.dart

@@ -440,13 +440,13 @@ String _backupFilePath(String pathToFile) {
 class RestoreFileException extends DCliException {
   /// Creates a [RestoreFileException] with the given
   /// message.
-  RestoreFileException(String message) : super(message);
+  RestoreFileException(super.message);
 }
 
 /// Thrown by the [backupFile] function when
 /// the file to be backed up is missing.
 class BackupFileException extends DCliException {
   /// Creates a [BackupFileException] with the given
   /// message.
-  BackupFileException(String message) : super(message);
+  BackupFileException(super.message);
 }

dcli_core/lib/src/functions/cat.dart

@@ -7,8 +7,6 @@
 import 'dart:convert';
 import 'dart:io';
 
-import 'package:stack_trace/stack_trace.dart';
-
 import '../../dcli_core.dart';
 
 /// Prints the contents of the file located at [path] to stdout.
@@ -47,5 +45,5 @@ class Cat extends DCliFunction {
 /// Thrown if the [cat] function encouters an error.
 class CatException extends DCliFunctionException {
   /// Thrown if the [cat] function encouters an error.
-  CatException(String reason, [Trace? stacktrace]) : super(reason, stacktrace);
+  CatException(super.reason, [super.stacktrace]);
 }

dcli_core/lib/src/functions/copy.dart

@@ -93,5 +93,5 @@ class _Copy extends DCliFunction {
 /// Throw when the [copy] function encounters an error.
 class CopyException extends DCliFunctionException {
   /// Throw when the [copy] function encounters an error.
-  CopyException(String reason) : super(reason);
+  CopyException(super.reason);
 }

dcli_core/lib/src/functions/copy_tree.dart

@@ -168,5 +168,5 @@ class _CopyTree extends DCliFunction {
 /// Throw when the [copy] function encounters an error.
 class CopyTreeException extends DCliFunctionException {
   /// Throw when the [copy] function encounters an error.
-  CopyTreeException(String reason) : super(reason);
+  CopyTreeException(super.reason);
 }

dcli_core/lib/src/functions/create_dir.dart

@@ -102,5 +102,5 @@ class _CreateDir extends DCliFunction {
 /// Thrown when the function [createDir] encounters an error
 class CreateDirException extends DCliFunctionException {
   /// Thrown when the function [createDir] encounters an error
-  CreateDirException(String reason) : super(reason);
+  CreateDirException(super.reason);
 }

dcli_core/lib/src/functions/dcli_function.dart

@@ -4,8 +4,6 @@
  * Written by Brett Sutton <[email protected]>, Jan 2022
  */
 
-import 'package:stack_trace/stack_trace.dart';
-
 import '../util/dcli_exception.dart';
 
 /// Base class for the classes that implement
@@ -15,6 +13,5 @@ class DCliFunction {}
 /// Base class for all dcli function exceptions.
 class DCliFunctionException extends DCliException {
   /// Base class for all dcli function exceptions.
-  DCliFunctionException(String message, [Trace? stackTrace])
-      : super(message, stackTrace);
+  DCliFunctionException(super.message, [super.stackTrace]);
 }

dcli_core/lib/src/functions/delete.dart

@@ -47,5 +47,5 @@ class _Delete extends DCliFunction {
 /// Thrown when the [delete] function encounters an error
 class DeleteException extends DCliFunctionException {
   /// Thrown when the [delete] function encounters an error
-  DeleteException(String reason) : super(reason);
+  DeleteException(super.reason);
 }

dcli_core/lib/src/functions/delete_dir.dart

@@ -63,5 +63,5 @@ class _DeleteDir extends DCliFunction {
 /// Throw when [deleteDir] function encounters an error
 class DeleteDirException extends DCliFunctionException {
   /// Throw when [deleteDir] function encounters an error
-  DeleteDirException(String reason) : super(reason);
+  DeleteDirException(super.reason);
 }

dcli_core/lib/src/functions/delete_tree.dart

@@ -146,5 +146,5 @@ class _DeleteTree extends DCliFunction {
 /// Thrown when the [deleteTree] function encouters an error.
 class DeleteTreeException extends DCliFunctionException {
   /// Thrown when the [deleteTree] function encouters an error.
-  DeleteTreeException(String reason) : super(reason);
+  DeleteTreeException(super.reason);
 }

dcli_core/lib/src/functions/env.dart

@@ -396,5 +396,5 @@ R withEnvironment<R>(R Function() callback,
 /// Base class for all Environment variable related exceptions.
 class EnvironmentException extends DCliException {
   /// Create an environment variable exception.
-  EnvironmentException(String message) : super(message);
+  EnvironmentException(super.message);
 }

dcli_core/lib/src/functions/find.dart

@@ -551,5 +551,5 @@ class FindItem {
 /// Thrown when the [find] function encouters an error.
 class FindException extends DCliFunctionException {
   /// Thrown when the [move] function encouters an error.
-  FindException(String reason) : super(reason);
+  FindException(super.reason);
 }

dcli_core/lib/src/functions/head.dart

@@ -49,5 +49,5 @@ class _Head extends DCliFunction {
 /// Thrown if the [head] function encounters an error.
 class HeadException extends DCliFunctionException {
   /// Thrown if the [head] function encounters an error.
-  HeadException(String reason) : super(reason);
+  HeadException(super.reason);
 }

dcli_core/lib/src/functions/move.dart

@@ -91,5 +91,5 @@ Future<void> _improveError(Object e, String from, String to) async {
 /// Thrown when the [move] function encouters an error.
 class MoveException extends DCliFunctionException {
   /// Thrown when the [move] function encouters an error.
-  MoveException(String reason) : super(reason);
+  MoveException(super.reason);
 }

dcli_core/lib/src/functions/move_dir.dart

@@ -84,5 +84,5 @@ class _MoveDir extends DCliFunction {
 /// Thrown when the [moveDir] function encouters an error.
 class MoveDirException extends DCliFunctionException {
   /// Thrown when the [moveDir] function encouters an error.
-  MoveDirException(String reason) : super(reason);
+  MoveDirException(super.reason);
 }

dcli_core/lib/src/functions/move_tree.dart

@@ -175,5 +175,5 @@ class _MoveTree extends DCliFunction {
 /// Thrown when the [moveTree] function encouters an error.
 class MoveTreeException extends DCliFunctionException {
   /// Thrown when the [moveTree] function encouters an error.
-  MoveTreeException(String reason) : super(reason);
+  MoveTreeException(super.reason);
 }

dcli_core/lib/src/functions/tail.dart

@@ -93,5 +93,5 @@ class _Tail extends DCliFunction {
 /// thrown when the [tail] function encounters an exception
 class TailException extends DCliFunctionException {
   /// thrown when the [tail] function encounters an exception
-  TailException(String reason) : super(reason);
+  TailException(super.reason);
 }

dcli_core/lib/src/functions/touch.dart

@@ -72,5 +72,5 @@ class _Touch extends DCliFunction {
 /// thrown when the [touch] function encounters an exception
 class TouchException extends DCliFunctionException {
   /// thrown when the [touch] function encounters an exception
-  TouchException(String reason) : super(reason);
+  TouchException(super.reason);
 }