Update romannumbers.en.md

subjects/romannumbers.en.md

@@ -9,7 +9,6 @@ The program should have a limit of `4000`. In case of an invalid number, for exa
 Roman Numerals reminder:
 
 | I |   1  |
-|:-:|:----:|
 | V |   5  |
 | X |  10  |
 | L |  50  |
@@ -17,29 +16,20 @@ Roman Numerals reminder:
 | D |  500 |
 | M | 1000 |
 
-
-I -> 1
-V -> 5
-X -> 10
-L -> 50
-C -> 100
-D -> 500
-M -> 1000
-
 For example, the number 1732 would be denoted MDCCXXXII in Roman numerals. However, Roman numerals are not a purely additive number system. In particular, instead of using four symbols to represent a 4, 40, 9, 90, etc. (i.e., IIII, XXXX, VIIII, LXXXX, etc.), such numbers are instead denoted by preceding the symbol for 5, 50, 10, 100, etc., with a symbol indicating subtraction. For example, 4 is denoted IV, 9 as IX, 40 as XL, etc.
 
 The following table gives the Roman numerals for the first few positive integers. 
 
-1	 I	  11 XI	   21	XXI
-2	 II	  12 XII	 22	XXII
-3	 III	13 XIII	 23	XXIII
-4	 IV	  14 XIV	 24	XXIV
-5	 V	  15 XV	   25	XXV
-6	 VI	  16 XVI	 26	XXVI
-7	 VII	17 XVII	 27	XXVII
-8	 VIII	18 XVIII 28	XXVIII
-9	 IX	  19 XIX	 29	XXIX
-10 X	  20 XX	   30	XXX
+|  1 |   I  | 11 |   XI  | 21 |   XXI  |
+|  2 |  II  | 12 |  XII  | 22 |  XXII  |
+|  3 |  III | 13 |  XIII | 23 |  XXIII |
+|  4 |  IV  | 14 |  XIV  | 24 |  XXIV  |
+|  5 |   V  | 15 |   XV  | 25 |   XXV  |
+|  6 |  VI  | 16 |  XVI  | 26 |  XXVI  |
+|  7 |  VII | 17 |  XVII | 27 |  XXVII |
+|  8 | VIII | 18 | XVIII | 28 | XXVIII |
+|  9 |  XIX | 19 |  XIX  | 29 |  XXIX  |
+| 10 |   X  | 20 |   XX  | 30 |   XXX  |
 
 ## Usage