fixed typos (see #235)

src/entt/entity/helper.hpp

@@ -44,7 +44,7 @@ private:
 
 
 /**
- * @brief Deduction guideline.
+ * @brief Deduction guide.
  *
  * It allows to deduce the constness of a registry directly from the instance
  * provided to the constructor.
@@ -97,7 +97,7 @@ private:
 
 
 /**
- * @brief Deduction guideline.
+ * @brief Deduction guide.
  *
  * It allows to deduce the constness of a registry directly from the instance
  * provided to the constructor.

src/entt/signal/delegate.hpp

@@ -250,7 +250,7 @@ bool operator!=(const delegate<Ret(Args...)> &lhs, const delegate<Ret(Args...)>
 
 
 /**
- * @brief Deduction guideline.
+ * @brief Deduction guide.
  *
  * It allows to deduce the function type of the delegate directly from a
  * function provided to the constructor.
@@ -263,7 +263,7 @@ delegate(connect_arg_t<Function>) ENTT_NOEXCEPT
 
 
 /**
- * @brief Deduction guideline.
+ * @brief Deduction guide.
  *
  * It allows to deduce the function type of the delegate directly from a member
  * or a free function with payload provided to the constructor.