From 40580f1bb6cf1f5a026a417aff061567411954bb Mon Sep 17 00:00:00 2001
From: Beta Ziliani <beta@manas.tech>
Date: Thu, 7 Nov 2024 16:46:28 -0300
Subject: [PATCH] Add type restrictions to Levenshtein (#15168)

It best documents what happens when no entry is between the tolerance level of distance
---
 src/levenshtein.cr | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/levenshtein.cr b/src/levenshtein.cr
index e890d59c90ef..01ad1bc40784 100644
--- a/src/levenshtein.cr
+++ b/src/levenshtein.cr
@@ -139,7 +139,7 @@ module Levenshtein
   # end
   # best_match # => "ello"
   # ```
-  def self.find(name, tolerance = nil, &)
+  def self.find(name, tolerance = nil, &) : String?
     Finder.find(name, tolerance) do |sn|
       yield sn
     end
@@ -154,7 +154,7 @@ module Levenshtein
   # Levenshtein.find("hello", ["hullo", "hel", "hall", "hell"], 2) # => "hullo"
   # Levenshtein.find("hello", ["hurlo", "hel", "hall"], 1)         # => nil
   # ```
-  def self.find(name, all_names, tolerance = nil)
+  def self.find(name, all_names, tolerance = nil) : String?
     Finder.find(name, all_names, tolerance)
   end
 end