✨ Support cp850 encoding for auto-completion in PowerShell (#808)

typer/_completion_shared.py

@@ -183,15 +183,15 @@ def install_powershell(*, prog_name: str, complete_var: str, shell: str) -> Path
     if isinstance(result.stdout, str):  # pragma: no cover
         path_str = result.stdout
     if isinstance(result.stdout, bytes):
-        try:
-            # PowerShell would be predominant in Windows
-            path_str = result.stdout.decode("windows-1252")
-        except UnicodeDecodeError:  # pragma: no cover
+        for encoding in ["windows-1252", "utf8", "cp850"]:
             try:
-                path_str = result.stdout.decode("utf8")
-            except UnicodeDecodeError:
-                click.echo("Couldn't decode the path automatically", err=True)
-                raise
+                path_str = result.stdout.decode(encoding)
+                break
+            except UnicodeDecodeError:  # pragma: no cover
+                pass
+        if not path_str:  # pragma: no cover
+            click.echo("Couldn't decode the path automatically", err=True)
+            raise click.exceptions.Exit(1)
     path_obj = Path(path_str.strip())
     parent_dir: Path = path_obj.parent
     parent_dir.mkdir(parents=True, exist_ok=True)