Hh sort by alphanum shorter first

CHANGELOG.md

+##  0.4.3
+
+* Make sort_by_alphanum sort shorter string first.
+
 ## 0.4.2
 
 * Make sort_by_alphanum stable for chunks that parse to the same int like 04 and 4.

lib/roqua-support/version.rb

 module Roqua
   module Support
-    VERSION = '0.4.2'.freeze
+    VERSION = '0.4.3'.freeze
   end
 end

lib/roqua/core_ext/enumerable/sort_by_alphanum.rb

@@ -33,6 +33,8 @@ module Enumerable
       ret = \
         if a_scanner.eos?
           -1
+        elsif b_scanner.eos?
+          1
         elsif (a_chunk = a_scanner.scan(ALL_NUM))
           if (b_chunk = b_scanner.scan(ALL_NUM))
             if a_chunk.to_i != b_chunk.to_i

spec/roqua/core_ext/enumerable/sort_by_alphanum_spec.rb

@@ -11,6 +11,11 @@ describe Enumerable do
       expect(input.sort_by_alphanum(&:reverse)).to eq ["004some10thing", "004some11thing", "3another"]
     end
 
+    it 'sorts shorter strings first' do
+      input = %w[a_2_ a_2 a a_1]  # curlies are above alpha in utf-8, Ԙ is multi-byte
+      expect(input.sort_by_alphanum).to eq %w[a a_1 a_2 a_2_]
+    end
+
     it 'treats non-alphanum as lower than alpha and num' do
       input = %w[b3a b{c bԘb]  # curlies are above alpha in utf-8, Ԙ is multi-byte
       expect(input.sort_by_alphanum).to eq %w[b{c bԘb b3a]