Hello everyone! first time coder here!

Can anyone please tell me why i keep getting the error from code? I had to transfer all the codes from replit to spyder to easily check it but still the correct code eludes me.

here is my code

```
def arithmetic_arranger(problems, solve = False):
line_1 = ""
line_2 = ""
line_3 = ""
line_4 = ""
arranged_problems = ""
#rule list
#limit problems to 5
if len(problems) > 5:
return "Error: Too many problems."
#problem arrangement, splitting into list
for index, value in enumerate(problems):
operation = value.split(" ")
#array, splitting first and second value to the operand
operand_1 = operation[0]
operand_2 = operation[2]
operator = operation[1]
#checking operator
if operator not in "-+":
return "Error: Operator must be '+' or '-'."
#checking value length
if len(operand_1) > 4 or len(operand_2) > 4:
return "Error: Numbers cannot be more than four digits."
#checking value
try:
value_1 = int(operand_1)
value_2 = int(operand_2)
except ValueError:
return "Error: Numbers must only contain digits."
#operation
sum = ""
if(operator == "+"):
sum = str(int(operand_1) + int(operand_2))
elif(operator == "-"):
sum = str(int(operand_1) - int(operand_2))
#length of the operation
length = max(len(operand_1), len(operand_2)) + 2
top = str(operand_1).rjust(length)
bot = operator + str(operand_2).rjust(length - 1)
dash = ""
answer = str(sum).rjust(length)
#dictates the length of dashes
for i in range(length):
dash += "-"
#output formatting
if operation != problems[-1]:
line_1 += top + ' '
line_2 += bot + ' '
line_3 += dash + ' '
line_4 += answer + ' '
else:
line_1 += top
line_2 += bot
line_3 += dash
line_4 += answer
line_1.rstrip()
line_2.rstrip()
line_3.strip()
if solve:
line_4.strip()
arranged_problems = line_1 + "\n" + line_2 + "\n" + line_3 + "\n" + line_4
else:
arranged_problems = line_1 + "\n" + line_2 + "\n" + line_3
return arranged_problems
```

looking at the error, it seems like a line is inserted but i can’t find where it happens

```
AssertionError: Expected different output when calling "arithmetic_arranger()" with
["3801 - 2", "123 + 49"]
E assert ' 3801 ... ----- ' == ' 3801 ...---- -----'
```