removed empty lines

Author: rongxin-liu

lib50/_api.py

@@ -469,7 +469,7 @@ def batch_files(files, size=100):
                 files_list = list(files)
                 for i in range(0, len(files_list), size):
                     yield files_list[i:i + size]
-
+            
             for batch in batch_files(included):
                 quoted_files = ' '.join(shlex.quote(f) for f in batch)
                 run(git(f"add -f -- {quoted_files}"))
@@ -966,7 +966,7 @@ def run(command, quiet=False, timeout=None):
                 ProgressBar.stop_all()
                 passphrase = _prompt_password("Enter passphrase for SSH key: ")
                 child.sendline(passphrase)
-
+        
                 # Get the full output by reading until EOF
                 full_output = child.before + child.after + child.read()
                 command_output = full_output.strip().replace("\r\n", "\n")

lib50/authentication.py

@@ -121,7 +121,7 @@ def run_authenticated(user, command, quiet=False, timeout=None):
                 # Try to extract the conflicting branch prefix from the error message
                 # Pattern: 'refs/heads/cs50/problems/2025/x' exists
                 branch_prefix_match = re.search(r"'refs/heads/([^']+)' exists", command_output)
-
+                
                 if branch_prefix_match:
                     conflicting_prefix = branch_prefix_match.group(1)
                     error_msg = _("Looks like you're trying to push to a branch that conflicts with an existing one in the repository.\n"
@@ -212,7 +212,7 @@ class State(enum.Enum):
         else:
             if not os.environ.get("CODESPACES"):
                 _show_gh_changes_warning()
-
+                
             return None
     finally:
         child.close()