settings: use a single underscore prefix for "private" methods.

The double underscore is used to denote metamethods and could
potentially (though unlikely) cause problems with forward compatibility.

src/requires.moon

@@ -9,15 +9,15 @@ mp.get_osd_size = mp.get_osd_size or mp.get_screen_size
 -- This is here instead of in settings.moon because it would conflict with the
 -- default settings generator tool if it were placed in settings, and this is
 -- the only file that goes before settings.
-settings = { __defaults: { } }
+settings = { _defaults: { } }
 
 -- These methods are jammed in a metatable so that they can't be overridden from
 -- the configuration file.
 settingsMeta = {
-	__reload: =>
+	_reload: =>
 		-- Shallow copy should be good. This is necessary to reset values to the
 		-- defaults so that removing a configuration key has an effect.
-		for key, value in pairs @__defaults
+		for key, value in pairs @_defaults
 			settings[key] = value
 
 		options.read_options @, script_name .. '/main'
@@ -28,7 +28,7 @@ settingsMeta = {
 			-- about failing to stroke zero-height object.
 			@['bar-height-inactive'] = 1
 
-	__migrate: =>
+	_migrate: =>
 		oldConfig = mp.find_config_file 'lua-settings/%s.conf'\format script_name
 		newConfigFile = 'lua-settings/%s/main.conf'\format script_name
 		newConfig = mp.find_config_file newConfigFile
@@ -59,11 +59,11 @@ settingsMeta = {
 				log.info 'Configuration successfully migrated.'
 
 	__newindex: ( key, value ) =>
-		@__defaults[key] = value
+		@_defaults[key] = value
 		rawset @, key, value
 }
 settingsMeta.__index = settingsMeta
 
 setmetatable settings, settingsMeta
 
-settings\__migrate!
+settings\_migrate!

src/settings.moon

@@ -377,4 +377,4 @@ will disappear without animating all the way off-screen. Positive values will
 cause the display to animate the wrong direction.
 ]]
 
-settings\__reload!
+settings\_reload!

tools/DefaultConfigGenerator.moon

@@ -1,24 +1,24 @@
 convertToComment = ( text ) ->
-	result = { '' }
+	result = { }
 	text\gsub '(.-)\n', ( line ) ->
 		table.insert result, '# ' .. line
 
-	table.concat result, '\n'
+	return table.concat result, '\n'
 
 convertToValue = ( value ) ->
 	switch type value
 		when 'boolean'
-			value and 'yes' or 'no'
+			return value and 'yes' or 'no'
 		when 'number'
-			tostring value
+			return tostring value
 		else
-			value
+			return value
 
 combined = {}
-for setting in *settings.__keys
+for setting in *settings._keys
 	value = settings[setting]
 	comment = convertToComment helpText[setting]
-	settingString = setting .. '=' .. convertToValue value
+	settingString = setting .. '=' .. convertToValue( value ) .. '\n'
 	table.insert combined, comment
 	table.insert combined, settingString
 table.insert combined, ''

tools/ReadOptionsStub.moon

@@ -1,5 +1,6 @@
 options = { read_options: -> }
-settings =  { __keys: { }, __reload: => }
-setmetatable settings, __newindex: ( key, value ) =>
-	table.insert @__keys, key
+settings =  { _keys: { }, _reload: => }
+setmetatable settings, { __newindex: ( key, value ) =>
+	table.insert @_keys, key
 	rawset @, key, value
+}