Fix inflection regexes for mouse, mice

activesupport/lib/active_support/inflections.rb

@@ -16,8 +16,8 @@ module ActiveSupport
     inflect.plural(/([^aeiouy]|qu)y$/i, '\1ies')
     inflect.plural(/(x|ch|ss|sh)$/i, '\1es')
     inflect.plural(/(matr|vert|ind)(?:ix|ex)$/i, '\1ices')
-    inflect.plural(/([m|l])ouse$/i, '\1ice')
-    inflect.plural(/([m|l])ice$/i, '\1ice')
+    inflect.plural(/(m|l)ouse$/i, '\1ice')
+    inflect.plural(/(m|l)ice$/i, '\1ice')
     inflect.plural(/^(ox)$/i, '\1en')
     inflect.plural(/^(oxen)$/i, '\1')
     inflect.plural(/(quiz)$/i, '\1zes')
@@ -35,7 +35,7 @@ module ActiveSupport
     inflect.singular(/(s)eries$/i, '\1eries')
     inflect.singular(/(m)ovies$/i, '\1ovie')
     inflect.singular(/(x|ch|ss|sh)es$/i, '\1')
-    inflect.singular(/([m|l])ice$/i, '\1ouse')
+    inflect.singular(/(m|l)ice$/i, '\1ouse')
     inflect.singular(/(bus)es$/i, '\1')
     inflect.singular(/(o)es$/i, '\1')
     inflect.singular(/(shoe)s$/i, '\1')

activesupport/test/inflector_test_cases.rb

@@ -104,7 +104,11 @@ module InflectorTestCases
     "edge"        => "edges",
 
     "cow"         => "kine",
-    "database"    => "databases"
+    "database"    => "databases",
+
+    # regression tests against improper inflection regexes
+    "|ice"        => "|ices",
+    "|ouse"       => "|ouses"
   }
 
   CamelToUnderscore = {