Improve Site#getConverterImpl and call it Site#find_converter_instance

lib/jekyll/filters.rb

@@ -10,7 +10,7 @@ module Jekyll
     # Returns the HTML formatted String.
     def textilize(input)
       site = @context.registers[:site]
-      converter = site.getConverterImpl(Jekyll::Converters::Textile)
+      converter = site.find_converter_instance(Jekyll::Converters::Textile)
       converter.convert(input)
     end
 
@@ -21,7 +21,7 @@ module Jekyll
     # Returns the HTML formatted String.
     def markdownify(input)
       site = @context.registers[:site]
-      converter = site.getConverterImpl(Jekyll::Converters::Markdown)
+      converter = site.find_converter_instance(Jekyll::Converters::Markdown)
       converter.convert(input)
     end
 
@@ -32,7 +32,7 @@ module Jekyll
     # Returns the CSS formatted String.
     def sassify(input)
       site = @context.registers[:site]
-      converter = site.getConverterImpl(Jekyll::Converters::Sass)
+      converter = site.find_converter_instance(Jekyll::Converters::Sass)
       converter.convert(input)
     end
 
@@ -43,7 +43,7 @@ module Jekyll
     # Returns the CSS formatted String.
     def scssify(input)
       site = @context.registers[:site]
-      converter = site.getConverterImpl(Jekyll::Converters::Scss)
+      converter = site.find_converter_instance(Jekyll::Converters::Scss)
       converter.convert(input)
     end
 

lib/jekyll/site.rb

@@ -414,13 +414,8 @@ module Jekyll
     # klass - The Class of the Converter to fetch.
     #
     # Returns the Converter instance implementing the given Converter.
-    def getConverterImpl(klass)
+    def find_converter_instance(klass)
-      matches = converters.select { |c| c.class == klass }
+      converters.find { |c| c.class == klass } || proc { raise "No converter for #{klass}" }.call
-      if impl = matches.first
-        impl
-      else
-        raise "Converter implementation not found for #{klass}"
-      end
     end
 
     # Create array of instances of the subclasses of the class or module