fix parameter names in internal Ruby API

asciidoctorj-core/src/main/resources/org/asciidoctor/internal/asciidoctorclass.rb

@@ -10,7 +10,7 @@ module Extensions
 require 'asciidoctor/extensions'
 
 class AsciidoctorModule
-	java_implements Java::Asciidoctor
+    java_implements Java::Asciidoctor
 
     def unregister_all_extensions()
         Asciidoctor::Extensions.unregister_all
@@ -64,16 +64,16 @@ def inline_macro(extensionName, blockSymbol)
         end
     end
 
-    def convert_file(content, options = {})
-        return Asciidoctor.convert_file(content, options)
+    def convert_file(filename, options = {})
+        return Asciidoctor.convert_file(filename, options)
     end
 
     def convert(content, options = {})
         return Asciidoctor.convert(content, options)
     end
 
-    def load_file(content, options = {})
-        return Asciidoctor.load_file(content, options)
+    def load_file(filename, options = {})
+        return Asciidoctor.load_file(filename, options)
     end
 
     def load(content, options = {})
@@ -88,15 +88,15 @@ def resolve_converter(backend)
         return Asciidoctor::Converter::Factory.resolve backend
     end
 
-    def converters()
+    def converters
         return Asciidoctor::Converter::Factory.converters.keys
     end
 
     def unregister_all_converters
         Asciidoctor::Converter::Factory.unregister_all
     end
 
-    def asciidoctorRuntimeEnvironmentVersion()
+    def asciidoctorRuntimeEnvironmentVersion
         return Asciidoctor::VERSION
     end
 end
@@ -111,4 +111,4 @@ class AbstractNode
     class AbstractBlock
         alias :append :<< unless respond_to? :append
     end
-end
+end