prefix config key with 'seo_' to avoid conflicts

docs/advanced-usage.md

@@ -142,12 +142,12 @@ Which will generate following canonical_url:
 ### Customizing title modifier for paginated pages
 
 You can override the default title modifier for paginated pages from `Page %{current} of %{total} for ` to a string of your
-choice by setting a `paginator_message` key in your `_config.yml`.
+choice by setting a `seo_paginator_message` key in your `_config.yml`.
 
 For example:  
 
 ```yml
-paginator_message: "%<current>s / %<total>s | "
+seo_paginator_message: "%<current>s / %<total>s | "
 ```
 
 While the value can be any string text, we recommend using a Ruby string-template containing the variables `current` and `total`

lib/jekyll-seo-tag/drop.rb

@@ -189,7 +189,7 @@ module Jekyll
 
         current = @context["paginator"]["page"]
         total = @context["paginator"]["total_pages"]
-        paginator_message = site["paginator_message"] || "Page %<current>s of %<total>s for "
+        paginator_message = site["seo_paginator_message"] || "Page %<current>s of %<total>s for "
 
         format(paginator_message, :current => current, :total => total) if current > 1
       end

spec/jekyll_seo_tag/drop_spec.rb

@@ -495,7 +495,7 @@ RSpec.describe Jekyll::SeoTag::Drop do
     end
 
     context "render custom pagination title" do
-      let(:config) { { "paginator_message" => "%<current>s of %<total>s" } }
+      let(:config) { { "seo_paginator_message" => "%<current>s of %<total>s" } }
 
       it "renders the correct page number" do
         expect(subject.send(:page_number)).to eq("2 of 10")