allow inlining (this did not provide a statistically significant performance boost - oh well)

src/sprite.rs

@@ -13,14 +13,17 @@ pub struct Sprite {
 }
 
 impl Sprite {
+    #[inline]
     fn name_line(&self) -> String {
         optional_data_line("NAME", self.name.as_ref())
     }
 
+    #[inline]
     fn dialogue_line(&self) -> String {
         optional_data_line("DLG", self.dialogue_id.as_ref())
     }
 
+    #[inline]
     fn room_position_line(&self) -> String {
         if self.room_id.is_some() && self.position.is_some() {
             format!(
@@ -33,10 +36,12 @@ impl Sprite {
         }
     }
 
+    #[inline]
     fn colour_line(&self) -> String {
         optional_data_line("COL", self.colour_id.as_ref())
     }
 
+    #[inline]
     fn item_lines(&self) -> String {
         if self.items.len() == 0 {
             "".to_string()
@@ -48,6 +53,7 @@ impl Sprite {
 }
 
 impl From<String> for Sprite {
+    #[inline]
     fn from(string: String) -> Sprite {
         let mut lines: Vec<&str> = string.lines().collect();