Improve code formatting and update to 2.0

The scripts were streamlined using more or less the following conventions:
 - space after a comma in lists of arguments
 - space around weak operators (+, -), no space around strong operators (*, /)
 - space after a comment start (#)
 - removed trailing spaces or tabs, apart from those that delimit the function indentation level (those could be removed too but since they are added automatically by the editor when typing code, keeping them for now)
 - function blocks separate by two newlines

The scene files were resaved with the (current) 2.0 format, and some scenes that were in XML format were converted to SCN, to be consistent across all demos.

10 files changed, 16 insertions, 48 deletions

diff --git a/demos/gui/drag_and_drop/drag_and_drop.scn b/demos/gui/drag_and_drop/drag_and_drop.scn
index 94a25cc53..9dec254ef 100644
--- a/demos/gui/drag_and_drop/drag_and_drop.scn
+++ b/demos/gui/drag_and_drop/drag_and_drop.scn
diff --git a/demos/gui/drag_and_drop/drag_drop_script.gd b/demos/gui/drag_and_drop/drag_drop_script.gd
index 21a737ce1..7bcaf1a35 100644
--- a/demos/gui/drag_and_drop/drag_drop_script.gd
+++ b/demos/gui/drag_and_drop/drag_drop_script.gd
@@ -2,23 +2,19 @@
 extends ColorPickerButton
 
 
-#virtual function
 func get_drag_data(pos):
-	
-	#use another colorpicker as drag preview
+	# use another colorpicker as drag preview
 	var cpb = ColorPickerButton.new()
-	cpb.set_color( get_color() )
-	cpb.set_size(Vector2(50,50))
+	cpb.set_color(get_color())
+	cpb.set_size(Vector2(50, 50))
 	set_drag_preview(cpb)
-	#return color as drag data
+	# return color as drag data
 	return get_color()
 
-#virtual function	
+
 func can_drop_data(pos, data):
-	return typeof(data)==TYPE_COLOR
+	return typeof(data) == TYPE_COLOR
+
 
-#virtual function
 func drop_data(pos, data):
 	set_color(data)
-		
-
diff --git a/demos/gui/input_mapping/controls.gd b/demos/gui/input_mapping/controls.gd
index 6ca059c81..7420053ef 100644
--- a/demos/gui/input_mapping/controls.gd
+++ b/demos/gui/input_mapping/controls.gd
@@ -11,10 +11,12 @@
 
 extends Control
 
+# member variables
 var player_actions = [ "move_up", "move_down", "move_left", "move_right", "jump" ]
 var action # To register the action the UI is currently handling
 var button # Button node corresponding to the above action
 
+
 func wait_for_input(action_bind):
 	action = action_bind
 	# See note at the beginning of the script
@@ -22,6 +24,7 @@ func wait_for_input(action_bind):
 	get_node("contextual_help").set_text("Press a key to assign to the '" + action + "' action.")
 	set_process_input(true)
 
+
 func _input(event):
 	# Handle the first pressed key
 	if (event.type == InputEvent.KEY):
@@ -39,6 +42,7 @@ func _input(event):
 			# Add the new key binding
 			InputMap.action_add_event(action, event)
 
+
 func _ready():
 	# Initialise each button with the default key binding from InputMap
 	var input_event
diff --git a/demos/gui/input_mapping/controls.scn b/demos/gui/input_mapping/controls.scn
index 03567fb69..98cbbca46 100644
--- a/demos/gui/input_mapping/controls.scn
+++ b/demos/gui/input_mapping/controls.scn
diff --git a/demos/gui/rich_text_bbcode/rich_text_bbcode.gd b/demos/gui/rich_text_bbcode/rich_text_bbcode.gd
index 30fac1f72..79a08c130 100644
--- a/demos/gui/rich_text_bbcode/rich_text_bbcode.gd
+++ b/demos/gui/rich_text_bbcode/rich_text_bbcode.gd
@@ -1,17 +1,6 @@
 
 extends Panel
 
-# member variables here, example:
-# var a=2
-# var b="textvar"
 
-func _ready():
-	# Initialization here
-	pass
-
-
-
-
-func _on_RichTextLabel_meta_clicked( meta ):
+func _on_RichTextLabel_meta_clicked(meta):
 	OS.shell_open(meta)
-	pass # replace with function body
diff --git a/demos/gui/rich_text_bbcode/rich_text_bbcode.scn b/demos/gui/rich_text_bbcode/rich_text_bbcode.scn
index 081338fd9..c908d44dc 100644
--- a/demos/gui/rich_text_bbcode/rich_text_bbcode.scn
+++ b/demos/gui/rich_text_bbcode/rich_text_bbcode.scn
diff --git a/demos/gui/translation/controls.gd b/demos/gui/translation/controls.gd
index f8403f49a..ae2e26362 100644
--- a/demos/gui/translation/controls.gd
+++ b/demos/gui/translation/controls.gd
@@ -1,20 +1,9 @@
 
 extends Panel
 
-# member variables here, example:
-# var a=2
-# var b="textvar"
-
-func _ready():
-	# Initialization here
-	pass
-
-
-
 
 func _on_back_pressed():
 	var s = load("res://main.scn")
 	var si = s.instance()
 	get_parent().add_child(si)
 	queue_free()
-	pass # replace with function body
diff --git a/demos/gui/translation/controls.scn b/demos/gui/translation/controls.scn
index 66e6d4770..055ac90b9 100644
--- a/demos/gui/translation/controls.scn
+++ b/demos/gui/translation/controls.scn
diff --git a/demos/gui/translation/main.gd b/demos/gui/translation/main.gd
index bf3c0c084..9b188cd58 100644
--- a/demos/gui/translation/main.gd
+++ b/demos/gui/translation/main.gd
@@ -1,31 +1,21 @@
 
 extends Panel
 
-# member variables here, example:
-# var a=2
-# var b="textvar"
-
-func _ready():
-	# Initialization here
-	pass
-
-
 
 func _goto_scene():
 	var s = load("res://controls.scn")
 	var si = s.instance()
 	get_parent().add_child(si)
 	queue_free()
-	pass
 
 
 func _on_system_pressed():
-	#will autodetect based on system, then fall back
-	#to english if not found
+	# will autodetect based on system, then fall back
+	# to english if not found
 	_goto_scene()
 
-#NOTE: Changling locale will not change the text in the controls,
-#      The scene must be reloaded for changes to take effect.      
+# NOTE: Changing locale will not change the text in the controls,
+#       The scene must be reloaded for changes to take effect.
 
 func _on_english_pressed():
 	TranslationServer.set_locale("en")
diff --git a/demos/gui/translation/main.scn b/demos/gui/translation/main.scn
index 76c9ba7b4..8fc0b4ffb 100644
--- a/demos/gui/translation/main.scn
+++ b/demos/gui/translation/main.scn