Arithmetic_arranger string problem

Python
1 
FAIL: test_arrangement (test_module.UnitTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/runner/boilerplate-arithmetic-formatter-FORKED/test_module.py", line 10, in test_arrangement
    self.assertEqual(actual, expected, 'Expected different output when calling "arithmetic_arranger()" with ["3 + 855", "3801 - 2", "45 + 43", "123 + 49"]')
AssertionError: '    **[23 chars]  123    \n+ 855    -    2    + 43    +  49   [35 chars]    ' != '    [23 chars]  123\n+ 855    -    2    + 43    +  49\n-----[23 chars]----**'
-     3      3801      45      123    
?                                 ----
+     3      3801      45      123
- + 855    -    2    + 43    +  49    
?                                 ----
+ + 855    -    2    + 43    +  49
- -----    ------    ----    -----    ?                                 ----
+ -----    ------    ----    ----- : Expected different output when calling "arithmetic_arranger()" with ["3 + 855", "3801 - 2", "45 + 43", "123 + 49"]

I have no idea what’s wrong with the strings. I’ve tested it on my IDE, and it shows that they both are not the same string.

actual = arithmetic_arranger(["11 + 4", "3801 - 2999", "1 + 2", "123 + 49", "1 - 9380"])
expected = "  11      3801      1      123         1\n+  4    - 2999    + 2    +  49    - 9380\n----    ------    ---    -----    ------"
if actual != expected:
    print(expected)
    print(actual)
    print("Error")

#####################
  11      3801      1      123         1
+  4    - 2999    + 2    +  49    - 9380
----    ------    ---    -----    ------
  11      3801      1      123         1    
+  4    - 2999    + 2    +  49    - 9380    
----    ------    ---    -----    ------    
Error

To me at least, they look identical. I don’t understand why it is not recognized as the same string.

Here is the code to my arithmetic_arranger:

def arithmetic_arranger(problems, check=False):
    if len(problems) >5:
        return 'Error: Too many problems.'
    arranged_problems = ''

    row_one = ''
    row_two = ''
    row_three = ''
    row_four = ''

    #Error Checks and construction of rows
    for eq in problems:
        equation = eq.split()
        eq = ''.join(eq.split(' '))
        if eq.find('+') == -1 and eq.find('-') == -1:
            return 'Error: Operator must be \'+\' or \'-\'.'

        regex_eq = re.split(pattern= r"[+\-]", string=eq)

        for i in regex_eq:
            if not i.isdigit():
                return 'Error: Numbers must only contain digits.'
            if len(i) > 4:
                return 'Error: Numbers cannot be more than four digits.'
        regex_eq = [int(i) for i in regex_eq]

        # For the white-spaces I just subtract the length of the highest value with the first number in an equation and then add 2
        row_one += ' '*(len(str(max(regex_eq))) - len(equation[0]) + 2) + '{}'.format(equation.pop(0)) + '    '
        row_two += '{}'.format(equation.pop(0)) + ' '*(len(str(max(regex_eq))) - len(equation[0]) + 1) + '{}'.format(equation.pop())+ '    '
        row_three += '{}'.format('-'*(len(str(max(regex_eq)))+2)) + '    '
        if check:
            row_four += ' '*(len(str(max(regex_eq))) - len(str(eval(eq))) + 2) + '{}'.format(str(eval(eq))) + '    '
    arranged_problems += row_one + '\n' + row_two + '\n' + row_three
    if check:
        arranged_problems += '\n' + row_four
    return arranged_problems
2

in this the lines starting with - are what should not be there, and the lines starting with + are what should be there, the lines with ? point out the differences

you have extra characters at the end of the lines