Fix (#401)

exercises/concept/crystal-hunter/.docs/instructions.md

@@ -12,7 +12,7 @@ Your goal is to write some rules that will be used in the game.
 
 In the game, the character will get bonus points if they touch a bandit while having a power-up.
 
-Define the `bonus_points?` method that takes two arguments (_if the character has an active power-up_ and _if the character is touching a bandit_) and returns a boolean value that tells whether the character will get bonus points or not.
+Define the `Rules#bonus_points?` method that takes two arguments (_if the character has an active power-up_ and _if the character is touching a bandit_) and returns a boolean value that tells whether the character will get bonus points or not.
 The method should return `true` only if the character has a power-up active and is touching a bandit, and `false` otherwise.
 
 ```Crystal
@@ -24,7 +24,7 @@ Rules.new.bonus_points?(false, true)
 
 In the game, the player gets points when picking up a crystal or a power-up.
 
-Define the `score?` method that takes two arguments (_if the character is touching a power-up_ and _if the character is touching a crystal_) and returns a boolean value indicating if the character scored or not.
+Define the `Rules#score?` method that takes two arguments (_if the character is touching a power-up_ and _if the character is touching a crystal_) and returns a boolean value indicating if the character scored or not.
 The method should return `true` if the character is touching a power-up or a crystal, and return `false` otherwise.
 
 ```crystal
@@ -34,7 +34,7 @@ Rules.new.score?(true, true)
 
 ## 3. Define if character loses
 
-Define the `lose?` method that takes two arguments (_if the character has a power-up active_ and _if the character is touching a bandit_) and returns a boolean value that indicates if the character loses or not.
+Define the `Rules#lose?` method that takes two arguments (_if the character has a power-up active_ and _if the character is touching a bandit_) and returns a boolean value that indicates if the character loses or not.
 The method should return `true` if the character is touching a bandit and does not have a power-up active, and return `false` otherwise.
 
 ```crystal
@@ -44,7 +44,7 @@ Rules.new.lose?(false, true)
 
 ## 4. Define if character wins
 
-Define the `win?` method that takes three arguments (_if the character has eaten all of the crystals_, _if the character has a power-up active_, and _if the character is touching a bandit_) and returns a boolean value indicating if the character wins or not.
+Define the `Rules#win?` method that takes three arguments (_if the character has eaten all of the crystals_, _if the character has a power-up active_, and _if the character is touching a bandit_) and returns a boolean value indicating if the character wins or not.
 The method should return `true` if the character has gathered all crystals and has not lost based on the arguments defined in part 3, and return `false` otherwise.
 
 ```crystal