fix: f-string; return None for Kali, NixOS rel_ver

.gitignore

@@ -1,2 +1,3 @@
 .venv
 dist
+uv.lock

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "qbt-helper"
-version = "0.2"
+version = "0.3"
 authors = [
         { name="Jeffrey Serio", email="hyperreal@fedoraproject.org" },
 ]

qbt_helper.py

@@ -57,10 +57,12 @@ def get_torrents_from_html(webpage_url: str, torrent_substring: str) -> list:
     urls = []
     for link in soup.find_all("a"):
         if torrent_substring in link.get("href"):
-            url = f"{webpage_url}/{link.get("href")}"
+            url = f"{webpage_url}/{link.get('href')}"
             response = requests.get(url)
             if response.status_code == 200:
                 urls.append(url)
+            else:
+                exit(f"Error verifying the URL: {url}")
 
     return urls
 
@@ -276,7 +278,10 @@ def get_tails_urls(rel_ver: str):
 
 def selection_prompt(distro_selection: str) -> tuple:
     choice = Prompt.ask("Enter 'a' to add; 'r' to remove.")
+    if distro_selection != "Kali Linux" and distro_selection != "NixOS":
         rel_ver = Prompt.ask(f"Enter a release version for {distro_selection}")
+    else:
+        rel_ver = None
     return (choice, rel_ver)
 
 
@@ -371,7 +376,7 @@ def main():
         case "Kali Linux":
             match action[0]:
                 case "a":
-                    add_torrents(get_kali_urls(action[1]), conn_info)
+                    add_torrents(get_kali_urls(), conn_info)
                 case "r":
                     remove_torrents("kali-linux", conn_info)
                 case _: