doc: fixed broken doc links

src/mania/gradual_difficulty.rs

@@ -19,11 +19,11 @@ use super::{
 /// Gradually calculate the difficulty attributes of an osu!mania map.
 ///
 /// Note that this struct implements [`Iterator`].
-/// On every call of [`Iterator::next`](Iterator::next), the map's next hit object will
+/// On every call of [`Iterator::next`], the map's next hit object will
 /// be processed and the [`ManiaDifficultyAttributes`] will be updated and returned.
 ///
 /// If you want to calculate performance attributes, use
-/// [`ManiaGradualPerformanceAttributes`](crate::mania::ManiaGradualPerformance) instead.
+/// [`ManiaGradualPerformance`](crate::mania::ManiaGradualPerformance) instead.
 ///
 /// # Example
 ///

src/mania/gradual_performance.rs

@@ -6,10 +6,9 @@ use super::{ManiaGradualDifficulty, ManiaPerformanceAttributes, ManiaScoreState}
 
 /// Gradually calculate the performance attributes of an osu!mania map.
 ///
-/// After each hit object you can call [`next`](`ManiaGradualPerformanceAttributes::next`)
+/// After each hit object you can call [`next`](`ManiaGradualPerformance::next`)
 /// and it will return the resulting current [`ManiaPerformanceAttributes`].
-/// To process multiple objects at once, use
-/// [`nth`](`ManiaGradualPerformanceAttributes::nth`) instead.
+/// To process multiple objects at once, use [`nth`](`ManiaGradualPerformance::nth`) instead.
 ///
 /// Both methods require a play's current score so far.
 /// Be sure the given score is adjusted with respect to mods.

src/mania/score_state.rs

@@ -1,6 +1,4 @@
 /// Aggregation for a score's current state i.e. what are the current hitresults.
-///
-/// This struct is used for [`ManiaGradualPerformanceAttributes`](crate::mania::ManiaGradualPerformance).
 #[derive(Clone, Debug, Default, Eq, PartialEq)]
 pub struct ManiaScoreState {
     /// Amount of current 320s.