reformatting and correction of title

subjects/reverserange.en.md

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+## reverserange
+
+### Instructions
+
+Write the function ReverseRange which must:
+
+- allocate (with make()) an array of integers.
+- fill it with consecutive values that begin at `end` and end at `start` (Including `start` and `end` !)
+- finally return that array.
+
+### Expected function
+
+```go
+func ReverseRange(start, end int) []int {
+
+}
+```
+
+Examples of output :
+
+- With (1, 3) the function will return an array containing 3, 2 and 1.
+- With (-1, 2) the function will return an array containing 2, 1, 0 and -1.
+- With (0, 0) the function will return an array containing 0.
+- With (0, -3) the function will return an array containing -3, -2, -1 and 0.