fix: addressed some issues from code review

Author: dusktreader

copier/template.py

@@ -170,8 +170,8 @@ class Task:
             If `None`, the project directory will be used.
 
         failure_message:
-            If provided, show the message when a task fails.
-            If not provided, show the exception message from `subprocess`.
+            Provides a message to pritn if the task fails.
+            If not provided, the subprocess exception message will be shown.
     """
 
     cmd: str | Sequence[str]

docs/configuring.md

@@ -1602,7 +1602,7 @@ Refer to the example provided below for more information.
         - command: Remove-Item {{ name_of_the_project }}\\README.md
           when: "{{ _copier_conf.os == 'windows' }}"
         - command: finalize-project
-          failure_message: Coudln't finalize {{ name_of_the_project }}
+          failure_message: Couldn't finalize {{ name_of_the_project }}
     ```
 
     Note: the example assumes you use [Invoke](https://www.pyinvoke.org/) as

tests/test_tasks.py

@@ -124,7 +124,7 @@ def test_pretend_mode(tmp_path_factory: pytest.TempPathFactory) -> None:
     copier.run_copy(str(src), dst, pretend=True, unsafe=True)
     assert not (dst / "created-by-task.txt").exists()
 
-Literal["linux", "macos", "windows"]
+
 @pytest.mark.parametrize(
     "os, filename",
     [