Fixed a typo of 'a' and 'an' and used f string in print statement (TheAlgorithms#7398)

Author: Kuldeep Borkar

boolean_algebra/norgate.py

@@ -1,13 +1,15 @@
-""" A NOR Gate is a logic gate in boolean algebra which results to false(0)
-    if any of the input is 1, and True(1) if  both the inputs are 0.
-   Following is the truth table of an NOR Gate:
+"""
+A NOR Gate is a logic gate in boolean algebra which results to false(0)
+if any of the input is 1, and True(1) if  both the inputs are 0.
+Following is the truth table of a NOR Gate:
    | Input 1 | Input 2 |  Output |
    |      0      |     0      |      1      |
    |      0      |     1      |      0      |
    |      1      |     0      |      0      |
    |      1      |     1      |      0      |
+
+Following is the code implementation of the NOR Gate
 """
-"""Following is the code implementation of the NOR Gate"""
 
 
 def nor_gate(input_1: int, input_2: int) -> int:
@@ -30,11 +32,11 @@ def nor_gate(input_1: int, input_2: int) -> int:
 
 def main() -> None:
     print("Truth Table of NOR Gate:")
-    print("| Input 1 |", " Input 2 |", " Output |")
-    print("|      0      |", "     0      |     ", nor_gate(0, 0), "     |")
-    print("|      0      |", "     1      |     ", nor_gate(0, 1), "     |")
-    print("|      1      |", "     0      |     ", nor_gate(1, 0), "     |")
-    print("|      1      |", "     1      |     ", nor_gate(1, 1), "     |")
+    print("|   Input 1   |  Input 2  | Output |")
+    print(f"|      0      |    0      |  {nor_gate(0, 0)}     |")
+    print(f"|      0      |    1      |  {nor_gate(0, 1)}     |")
+    print(f"|      1      |    0      |  {nor_gate(1, 0)}     |")
+    print(f"|      1      |    1      |  {nor_gate(1, 1)}     |")
 
 
 if __name__ == "__main__":