Fix typo (#3)

* Fix typo
* Add note about strict arg

Author: Blacksmoke16

src/abstract_negotiator.cr

@@ -11,6 +11,8 @@ abstract class Athena::Negotiation::AbstractNegotiator(HeaderType)
 
   # Returns the best `HeaderType` type based on the provided *header* value and *priorities*.
   #
+  # If *strict* is `true`, an `ANG::Exceptions::Exception` will be raised if the *header* contains an invalid value, otherwise it is ignored.
+  #
   # See `Athena::Negotiation` for examples.
   def best(header : String, priorities : Indexable(String), strict : Bool = false) : HeaderType?
     raise ArgumentError.new "priorities should not be empty." if priorities.empty?

src/athena-negotiation.cr

@@ -67,7 +67,7 @@ alias ANG = Athena::Negotiation
 # accept.coding # => "gzip"
 # ```
 #
-# The `ANG::EncodingNegotiator` type returns an `ANG::AcceptEncoding`, or `nil` if negotiating the best character set has failed.
+# The `ANG::EncodingNegotiator` type returns an `ANG::AcceptEncoding`, or `nil` if negotiating the best encoding has failed.
 #
 # ### Language
 #
@@ -84,7 +84,7 @@ alias ANG = Athena::Negotiation
 # accept.script   # => "hans"
 # ```
 #
-# The `ANG::LanguageNegotiator` type returns an `ANG::AcceptLanguage`, or `nil` if negotiating the best character set has failed.
+# The `ANG::LanguageNegotiator` type returns an `ANG::AcceptLanguage`, or `nil` if negotiating the best language has failed.
 module Athena::Negotiation
   # Returns a lazily initialized `ANG::Negotiator` singleton instance.
   class_getter(negotiator) { ANG::Negotiator.new }