use ready-made function for splitting lines

src/main.rs

@@ -353,7 +353,7 @@ fn animation_frames_to_string(animation_frames: Vec<Image>) -> String {
 }
 
 fn tile_from_string(string: String) -> Tile {
-    let mut lines: Vec<&str> = string.split("\n").collect();
+    let mut lines: Vec<&str> = string.lines().collect();
 
     let id = lines[0].replace("TIL ", "");
 
@@ -589,7 +589,7 @@ fn test_avatar_to_string() {
 }
 
 fn sprite_from_string(string: String) -> Sprite {
-    let mut lines: Vec<&str> = string.split("\n").collect();
+    let mut lines: Vec<&str> = string.lines().collect();
 
     let id = lines[0].replace("SPR ", "");
     let mut name = None;
@@ -659,7 +659,7 @@ fn test_sprite_to_string() {
 }
 
 fn item_from_string(string: String) -> Item {
-    let mut lines: Vec<&str> = string.split("\n").collect();
+    let mut lines: Vec<&str> = string.lines().collect();
 
     let id = lines[0].replace("ITM ", "");
     let mut name = None;
@@ -783,7 +783,7 @@ fn test_ending_to_string() {
 }
 
 fn dialogue_from_string(string: String) -> Dialogue {
-    let lines: Vec<&str> = string.split("\n").collect();
+    let lines: Vec<&str> = string.lines().collect();
     let id = lines[0].replace("DLG ", "").to_string();
     let contents = lines[1..].join("\n");
 
@@ -847,7 +847,7 @@ fn test_variable_to_string() {
 
 fn room_from_string(string: String) -> Room {
     // todo handle room_format?
-    let mut lines: Vec<&str> = string.split("\n").collect();
+    let mut lines: Vec<&str> = string.lines().collect();
     let id = lines[0].replace("ROOM ", "");
     let mut name = None;
     let mut palette = "0".to_string();