Improved rail block related names.

Notably:
- **fixed** `AbstractRailBlock` `allowCurves` -> `uncurvable`: its name was inverted
- `RailPlacementHelper` -> `RailShaper`: it's used to update states (not just for placement), and it sets states (doesn't just get them)

buildSrc/src/main/resources/minecraft_specific_words.txt

@@ -408,6 +408,7 @@ uniquifier
 unapply
 unblocker
 uncached
+uncurvable
 unmap
 unpowering
 unpowered

mappings/net/minecraft/block/AbstractRailBlock.mapping

@@ -1,12 +1,12 @@
 CLASS net/minecraft/unmapped/C_mgkftsgg net/minecraft/block/AbstractRailBlock
-	FIELD f_afdevxyp allowCurves Z
+	FIELD f_afdevxyp uncurvable Z
 	FIELD f_hugfgcne WATERLOGGED Lnet/minecraft/unmapped/C_xhwijdsd;
 	FIELD f_qnbjbbpm STRAIGHT_SHAPE Lnet/minecraft/unmapped/C_zscvhwbd;
 	FIELD f_vrvdpeyj ASCENDING_SHAPE Lnet/minecraft/unmapped/C_zscvhwbd;
 	METHOD <init> (ZLnet/minecraft/unmapped/C_triydqro$C_xnkxsdfy;)V
-		ARG 1 allowCurves
+		ARG 1 uncurvable
 		ARG 2 settings
-	METHOD m_gnxvkdbi canMakeCurves ()Z
+	METHOD m_gnxvkdbi isUncurvable ()Z
 	METHOD m_hrqcdmdw getShapeProperty ()Lnet/minecraft/unmapped/C_vzlztuyw;
 	METHOD m_lczpeazs isRail (Lnet/minecraft/unmapped/C_txtbiemp;)Z
 		ARG 0 state
@@ -15,12 +15,11 @@ CLASS net/minecraft/unmapped/C_mgkftsgg net/minecraft/block/AbstractRailBlock
 		ARG 2 world
 		ARG 3 pos
 		ARG 4 notify
-	METHOD m_oyknusit shouldDropRail (Lnet/minecraft/unmapped/C_hynzadkk;Lnet/minecraft/unmapped/C_cdctfzbn;Lnet/minecraft/unmapped/C_wqmdpcsg;)Z
-		COMMENT Checks if this rail should be dropped.
+	METHOD m_oyknusit shouldBreak (Lnet/minecraft/unmapped/C_hynzadkk;Lnet/minecraft/unmapped/C_cdctfzbn;Lnet/minecraft/unmapped/C_wqmdpcsg;)Z
+		COMMENT Checks if this rail should break.
 		COMMENT
-		COMMENT <p>This method will return true if:
-		COMMENT <ul><li>The rail block is ascending.</li>
-		COMMENT <li>The block in the direction of ascent does not have a top rim.</li></ul>
+		COMMENT @return {@code true} if the block below or the block {@code shape} is ascending
+		COMMENT toward has no top rim, or {@code false} otherwise
 		ARG 0 pos
 		ARG 1 world
 		ARG 2 shape

mappings/net/minecraft/block/DetectorRailBlock.mapping

@@ -3,7 +3,7 @@ CLASS net/minecraft/unmapped/C_zqpbsygh net/minecraft/block/DetectorRailBlock
 	FIELD f_jedrripe CODEC Lcom/mojang/serialization/MapCodec;
 	FIELD f_pxzqiwxu SHAPE Lnet/minecraft/unmapped/C_cgckxfsw;
 	FIELD f_quzejqpi SCHEDULED_TICK_DELAY I
-	METHOD m_eipmlwqv updateNearbyRails (Lnet/minecraft/unmapped/C_cdctfzbn;Lnet/minecraft/unmapped/C_hynzadkk;Lnet/minecraft/unmapped/C_txtbiemp;Z)V
+	METHOD m_eipmlwqv updateNeighboringRails (Lnet/minecraft/unmapped/C_cdctfzbn;Lnet/minecraft/unmapped/C_hynzadkk;Lnet/minecraft/unmapped/C_txtbiemp;Z)V
 		ARG 1 world
 		ARG 2 pos
 		ARG 3 state
@@ -19,7 +19,7 @@ CLASS net/minecraft/unmapped/C_zqpbsygh net/minecraft/block/DetectorRailBlock
 		ARG 0 cart
 	METHOD m_nhdhwndc getCartDetectionBox (Lnet/minecraft/unmapped/C_hynzadkk;)Lnet/minecraft/unmapped/C_hbcjzgoe;
 		ARG 1 pos
-	METHOD m_wvmxinfs updatePoweredStatus (Lnet/minecraft/unmapped/C_cdctfzbn;Lnet/minecraft/unmapped/C_hynzadkk;Lnet/minecraft/unmapped/C_txtbiemp;)V
+	METHOD m_wvmxinfs updatePowered (Lnet/minecraft/unmapped/C_cdctfzbn;Lnet/minecraft/unmapped/C_hynzadkk;Lnet/minecraft/unmapped/C_txtbiemp;)V
 		ARG 1 world
 		ARG 2 pos
 		ARG 3 state

mappings/net/minecraft/block/PoweredRailBlock.mapping

@@ -6,9 +6,11 @@ CLASS net/minecraft/unmapped/C_kgjmyjbt net/minecraft/block/PoweredRailBlock
 		ARG 1 world
 		ARG 2 pos
 		ARG 3 state
+		ARG 4 towardSouthWest
 		ARG 5 distance
 	METHOD m_thcgcfzo isPoweredByOtherRails (Lnet/minecraft/unmapped/C_cdctfzbn;Lnet/minecraft/unmapped/C_hynzadkk;ZILnet/minecraft/unmapped/C_wqmdpcsg;)Z
 		ARG 1 world
 		ARG 2 pos
+		ARG 3 towardSouthWest
 		ARG 4 distance
 		ARG 5 shape

mappings/net/minecraft/block/RailPlacementHelper.mapping → mappings/net/minecraft/block/RailShaper.mapping

@@ -1,9 +1,9 @@
-CLASS net/minecraft/unmapped/C_baboixhf net/minecraft/block/RailPlacementHelper
+CLASS net/minecraft/unmapped/C_baboixhf net/minecraft/block/RailShaper
 	FIELD f_eahnpbkg world Lnet/minecraft/unmapped/C_cdctfzbn;
-	FIELD f_hemssstp allowCurves Z
+	FIELD f_hemssstp uncurvable Z
 	FIELD f_hlyugvpt state Lnet/minecraft/unmapped/C_txtbiemp;
 	FIELD f_rryvaloh pos Lnet/minecraft/unmapped/C_hynzadkk;
-	FIELD f_wturrxrq block Lnet/minecraft/unmapped/C_mgkftsgg;
+	FIELD f_wturrxrq rail Lnet/minecraft/unmapped/C_mgkftsgg;
 	FIELD f_zqdajzpc neighbors Ljava/util/List;
 	METHOD <init> (Lnet/minecraft/unmapped/C_cdctfzbn;Lnet/minecraft/unmapped/C_hynzadkk;Lnet/minecraft/unmapped/C_txtbiemp;)V
 		ARG 1 world
@@ -17,17 +17,17 @@ CLASS net/minecraft/unmapped/C_baboixhf net/minecraft/block/RailPlacementHelper
 	METHOD m_iyefeyle computeRailShape (Lnet/minecraft/unmapped/C_baboixhf;)V
 		ARG 1 placementHelper
 	METHOD m_kdjdlukx getNeighborCount ()I
-	METHOD m_krxloedb getBlockState ()Lnet/minecraft/unmapped/C_txtbiemp;
+	METHOD m_krxloedb getState ()Lnet/minecraft/unmapped/C_txtbiemp;
 	METHOD m_mwvknrio isVerticallyNearRail (Lnet/minecraft/unmapped/C_hynzadkk;)Z
 		ARG 1 pos
-	METHOD m_pbhepuoc getNeighboringRail (Lnet/minecraft/unmapped/C_hynzadkk;)Lnet/minecraft/unmapped/C_baboixhf;
+	METHOD m_pbhepuoc createNeighboring (Lnet/minecraft/unmapped/C_hynzadkk;)Lnet/minecraft/unmapped/C_baboixhf;
 		ARG 1 pos
 	METHOD m_uhplfsvb computeNeighbors (Lnet/minecraft/unmapped/C_wqmdpcsg;)V
 		ARG 1 shape
 	METHOD m_wbrfjfef updateBlockState (ZZLnet/minecraft/unmapped/C_wqmdpcsg;)Lnet/minecraft/unmapped/C_baboixhf;
 		ARG 1 powered
 		ARG 2 forceUpdate
-		ARG 3 railShape
+		ARG 3 shape
 	METHOD m_xktdbyvo getNeighbors ()Ljava/util/List;
 	METHOD m_xzghrphx canConnect (Lnet/minecraft/unmapped/C_hynzadkk;)Z
 		ARG 1 pos