input: Write a function to print a formatted table of grades for a given set of students. The function should take a list of dictionaries as its input, where each dictionary contains a student's name and grade. The table should be formatted such that the names are aligned to the left and the grades are right next to the names.
  
  assert print_grade_table([{'name': "John", 'grade': 92}, {'name': "Alice", 'grade': 95}, {'name': "Bob", 'grade': 87}]) == None
output: def print_grade_table(students):
      for student in students:
          print(f"{student['name']}: {student['grade']}")