style: format code and docs with prettier

Author: pranjal030404

solution/0000-0099/0016.3Sum Closest/README.md

@@ -317,7 +317,7 @@ class Solution {
 
 #### C
 
-``` C
+```C
 int cmp(const void *a, const void *b) { return *(int *)a - *(int *)b; }
 
 int threeSumClosest(int *nums, int numsSize, int target) {

solution/0000-0099/0016.3Sum Closest/README_EN.md

@@ -316,7 +316,7 @@ class Solution {
 
 #### C
 
-``` C
+```C
 int cmp(const void *a, const void *b) { return *(int *)a - *(int *)b; }
 
 int threeSumClosest(int *nums, int numsSize, int target) {

solution/0000-0099/0017.Letter Combinations of a Phone Number/README.md

@@ -557,7 +557,7 @@ class Solution {
 
 #### C
 
-``` C
+```C
 char *map[] = {"",    "",    "abc",  "def", "ghi",
                "jkl", "mno", "pqrs", "tuv", "wxyz"};
 

solution/0000-0099/0017.Letter Combinations of a Phone Number/README_EN.md

@@ -553,7 +553,7 @@ class Solution {
 
 #### C
 
-``` C
+```C
 char *map[] = {"",    "",    "abc",  "def", "ghi",
                "jkl", "mno", "pqrs", "tuv", "wxyz"};