Add missing documentation.

Author: samuel-williams-shopify

lib/decode/location.rb

@@ -6,6 +6,9 @@
 module Decode
 	# Represents a location in a source file.
 	class Location
+		# Initialize a new location.
+		# @parameter path [String] The path to the source file.
+		# @parameter line [Integer] The line number in the source file.
 		def initialize(path, line)
 			@path = path
 			@line = line

lib/decode/rbs/type.rb

@@ -8,6 +8,7 @@
 
 module Decode
 	module RBS
+		# Utilities for working with RBS types.
 		module Type
 			# Check if an RBS type represents a nullable/optional type
 			# This method recursively traverses the type tree to find nil anywhere

sig/decode.rbs

@@ -852,7 +852,8 @@ module Decode
 
     @line: Integer
 
-    public def initialize: (untyped path, untyped line) -> void
+    # Initialize a new location.
+    public def initialize: (String path, Integer line) -> void
 
     # Generate a string representation of the location.
     public def to_s: () -> untyped
@@ -994,6 +995,7 @@ module Decode
       private def build_attributes_rbs: (Array attribute_definitions) -> Array
     end
 
+    # Utilities for working with RBS types.
     module Type
       # Check if an RBS type represents a nullable/optional type
       # This method recursively traverses the type tree to find nil anywhere