[abc294] Change function name

Author: João Pedro Limão

atcoder/abc294/a_filter.go

@@ -11,7 +11,7 @@ Link: https://atcoder.jp/contests/abc294/tasks/abc294_a
 Contest: abc294
 */
 
-func main() {
+func filter() {
 // Time: O(N)
 // Space: O(N)
 

atcoder/abc294/b_ascii_art.go

@@ -11,7 +11,7 @@ Link: https://atcoder.jp/contests/abc294/tasks/abc294_b
 Contest: abc294
 */
 
-func main() {
+func asciiArt() {
 // Time: O(N^2)
 // Space: O(1)
 

atcoder/abc294/c_merge_sequences.go

@@ -9,7 +9,7 @@ Link: https://atcoder.jp/contests/abc294/tasks/abc294_c
 Contest: abc294
 */
 
-func main() {
+func mergeSequence() {
 
 var a, b int
 fmt.Scanf("%d %d", &a, &b)