From 6ffda80a8a24aee01c1e2935ee5527eaadff721d Mon Sep 17 00:00:00 2001
From: Douglas Eichelberger <dduugg@gmail.com>
Date: Tue, 7 Mar 2023 10:14:57 -0800
Subject: [PATCH] brew style

---
 Library/Homebrew/test/utils_spec.rb | 48 +++++++++++++++--------------
 Library/Homebrew/utils.rb           |  5 ++-
 2 files changed, 29 insertions(+), 24 deletions(-)

diff --git a/Library/Homebrew/test/utils_spec.rb b/Library/Homebrew/test/utils_spec.rb
index 50dcb15228..9727e697ea 100644
--- a/Library/Homebrew/test/utils_spec.rb
+++ b/Library/Homebrew/test/utils_spec.rb
@@ -61,29 +61,31 @@ describe Utils do
 
   describe ".underscore" do
     # commented out entries require acronyms inflections
-    let (:words) {
-      [["API", "api"],
-      ["APIController", "api_controller"],
-      ["Nokogiri::HTML", "nokogiri/html"],
-      # ["HTTPAPI", "http_api"],
-      ["HTTP::Get", "http/get"],
-      ["SSLError", "ssl_error"],
-      # ["RESTful", "restful"],
-      # ["RESTfulController", "restful_controller"],
-      # ["Nested::RESTful", "nested/restful"],
-      # ["IHeartW3C", "i_heart_w3c"],
-      # ["PhDRequired", "phd_required"],
-      # ["IRoRU", "i_ror_u"],
-      # ["RESTfulHTTPAPI", "restful_http_api"],
-      # ["HTTP::RESTful", "http/restful"],
-      # ["HTTP::RESTfulAPI", "http/restful_api"],
-      # ["APIRESTful", "api_restful"],
-      ["Capistrano", "capistrano"],
-      ["CapiController", "capi_controller"],
-      ["HttpsApis", "https_apis"],
-      ["Html5", "html5"],
-      ["Restfully", "restfully"],
-      ["RoRails", "ro_rails"]]
+    let(:words) {
+      [
+        ["API", "api"],
+        ["APIController", "api_controller"],
+        ["Nokogiri::HTML", "nokogiri/html"],
+        # ["HTTPAPI", "http_api"],
+        ["HTTP::Get", "http/get"],
+        ["SSLError", "ssl_error"],
+        # ["RESTful", "restful"],
+        # ["RESTfulController", "restful_controller"],
+        # ["Nested::RESTful", "nested/restful"],
+        # ["IHeartW3C", "i_heart_w3c"],
+        # ["PhDRequired", "phd_required"],
+        # ["IRoRU", "i_ror_u"],
+        # ["RESTfulHTTPAPI", "restful_http_api"],
+        # ["HTTP::RESTful", "http/restful"],
+        # ["HTTP::RESTfulAPI", "http/restful_api"],
+        # ["APIRESTful", "api_restful"],
+        ["Capistrano", "capistrano"],
+        ["CapiController", "capi_controller"],
+        ["HttpsApis", "https_apis"],
+        ["Html5", "html5"],
+        ["Restfully", "restfully"],
+        ["RoRails", "ro_rails"],
+      ]
     }
 
     it "converts strings to underscore case" do
diff --git a/Library/Homebrew/utils.rb b/Library/Homebrew/utils.rb
index 1880aee7d5..d87b835628 100644
--- a/Library/Homebrew/utils.rb
+++ b/Library/Homebrew/utils.rb
@@ -144,8 +144,11 @@ module Utils
   sig { params(camel_cased_word: T.any(String, Symbol)).returns(String) }
   def self.underscore(camel_cased_word)
     return camel_cased_word unless /[A-Z-]|::/.match?(camel_cased_word)
+
     word = camel_cased_word.to_s.gsub("::", "/")
-    word.gsub!(/([A-Z])(?=[A-Z][a-z])|([a-z\d])(?=[A-Z])/) { ($1 || $2) << "_" }
+    word.gsub!(/([A-Z])(?=[A-Z][a-z])|([a-z\d])(?=[A-Z])/) do
+      (::Regexp.last_match(1) || ::Regexp.last_match(2)) << "_"
+    end
     word.tr!("-", "_")
     word.downcase!
     word