Update grace period message format to use "day(s)" for consistency in attribution comments

Author: AbanoubGhadban

react_on_rails_pro/lib/react_on_rails_pro/utils.rb

@@ -173,7 +173,7 @@ def self.pro_attribution_comment
       # Check if in grace period
       grace_days = ReactOnRailsPro::LicenseValidator.grace_days_remaining
       comment = if grace_days
-                  "#{base} | Licensed (Expired - Grace Period: #{grace_days} days remaining)"
+                  "#{base} | Licensed (Expired - Grace Period: #{grace_days} day(s) remaining)"
                 elsif ReactOnRailsPro::LicenseValidator.evaluation?
                   "#{base} | Evaluation License"
                 else

react_on_rails_pro/spec/react_on_rails_pro/utils_spec.rb

@@ -239,7 +239,7 @@ module ReactOnRailsPro
         it "returns attribution comment with grace period information" do
           result = described_class.pro_attribution_comment
           expected = "<!-- Powered by React on Rails Pro (c) ShakaCode | " \
-                     "Licensed (Expired - Grace Period: 15 days remaining) -->"
+                     "Licensed (Expired - Grace Period: 15 day(s) remaining) -->"
           expect(result).to eq(expected)
         end
       end
@@ -252,7 +252,7 @@ module ReactOnRailsPro
         it "returns attribution comment with singular day" do
           result = described_class.pro_attribution_comment
           expected = "<!-- Powered by React on Rails Pro (c) ShakaCode | " \
-                     "Licensed (Expired - Grace Period: 1 days remaining) -->"
+                     "Licensed (Expired - Grace Period: 1 day(s) remaining) -->"
           expect(result).to eq(expected)
         end
       end
@@ -276,7 +276,7 @@ module ReactOnRailsPro
         it "returns attribution comment with grace period information" do
           result = described_class.pro_attribution_comment
           expected = "<!-- Powered by React on Rails Pro (c) ShakaCode | " \
-                     "Licensed (Expired - Grace Period: 0 days remaining) -->"
+                     "Licensed (Expired - Grace Period: 0 day(s) remaining) -->"
           expect(result).to eq(expected)
         end
       end