Fix method comments

`rake doc` shows some warnings.
I fixed method comments to suppress it.

middleman-core/lib/middleman-core/configuration.rb

@@ -19,7 +19,7 @@ module Middleman
         # @deprecated Prefer accessing settings through "config".
         #
         # @param [Symbol] key Name of the attribue
-        # @param value Attribute value
+        # @param default Attribute value
         # @return [void]
         def set(key, default=nil, &block)
           config.define_setting(key, default)

middleman-core/lib/middleman-core/sitemap/resource.rb

@@ -143,7 +143,7 @@ module Middleman
 
       # Whether the source file is binary.
       #
-      # @retrun [Boolean]
+      # @return [Boolean]
       def binary?
         ::Middleman::Util.binary?(source_file)
       end

middleman-core/lib/middleman-core/sitemap/store.rb

@@ -126,8 +126,6 @@ module Middleman
 
       # Register a handler to provide metadata on a url path
       # @param [Regexp] matcher
-      # @param [Symbol] origin an indicator of where this metadata came from - only one
-      #                        block per [matcher, origin] pair may exist.
       # @return [Array<Array<Proc, Regexp>>]
       def provides_metadata_for_path(matcher=nil, &block)
         @_provides_metadata_for_path ||= []

middleman-core/lib/middleman-core/util.rb

@@ -27,12 +27,12 @@ module Middleman
       return false if Tilt.registered?(ext.sub('.',''))
 
       ext = ".#{ext}" unless ext.to_s[0] == ?.
-      mime = ::Rack::Mime.mime_type(ext, nil) 
+      mime = ::Rack::Mime.mime_type(ext, nil)
       unless mime
         binary_bytes = [0, 1, 2, 3, 4, 5, 6, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31]
-        s = File.read(filename, 4096) || ''        
+        s = File.read(filename, 4096) || ''
         s.each_byte do |c|
-          return true if binary_bytes.include?(c)          
+          return true if binary_bytes.include?(c)
         end
         return false
       end
@@ -133,7 +133,7 @@ module Middleman
     # Get a recusive list of files inside a set of paths.
     # Works with symlinks.
     #
-    # @param path A path string or Pathname
+    # @param paths Some paths string or Pathname
     # @return [Array] An array of filenames
     def self.all_files_under(*paths)
       paths.flatten!

middleman-more/lib/middleman-more/core_extensions/default_helpers.rb

@@ -50,7 +50,6 @@ module Middleman
         # Output a stylesheet link tag based on the current path
         #
         # @param [Symbol] asset_ext The type of asset
-        # @param [String] separator How to break up path in parts
         # @param [String] asset_dir Where to look for assets
         # @return [void]
         def auto_tag(asset_ext, asset_dir=nil)