Testing Python syntax fixes...
Checking syntax of input/file1.py...
  File "input/file1.py", line 1
    def hello_world()
                     ^
SyntaxError: expected ':'
✗ input/file1.py: Syntax ERROR
Checking syntax of input/file2.py...
✓ input/file2.py: Syntax OK
Checking syntax of input/file3.py...
✓ input/file3.py: Syntax OK
Checking syntax of input/file4.py...
  File "input/file4.py", line 12
    print("Original:", data))
                            ^
SyntaxError: unmatched ')'
✗ input/file4.py: Syntax ERROR
Checking syntax of input/file5.py...
✓ input/file5.py: Syntax OK

Summary:
Total files checked: 5
Files with syntax errors: 2
FAILURE: 2 file(s) still have syntax errors