wscript: fix whitespace formatting

No tabs and no trailing spaces.

gtk2_ardour/wscript

@@ -156,7 +156,7 @@ gtk2_ardour_sources = [
         'main.cc',
         'main_clock.cc',
         'marker.cc',
-    	'mergeable_line.cc',
+        'mergeable_line.cc',
         'midi_automation_line.cc',
         'midi_channel_dialog.cc',
         'midi_channel_selector.cc',

libs/aaf/wscript

@@ -16,22 +16,22 @@ top = '.'
 out = 'build'
 
 libaaf_sources = [
-	'AAFClass.c',
-	'AAFCore.c',
-	'AAFDump.c',
-	'AAFIEssenceFile.c',
-	'AAFIface.c',
-	'AAFIParser.c',
-	'AAFToText.c',
-	'CFBDump.c',
-	'LibCFB.c',
-	'ProTools.c',
-	'MediaComposer.c',
-	'Resolve.c',
-	'RIFFParser.c',
-	'URIParser.c',
-	'utils.c',
-	'log.c',
+    'AAFClass.c',
+    'AAFCore.c',
+    'AAFDump.c',
+    'AAFIEssenceFile.c',
+    'AAFIface.c',
+    'AAFIParser.c',
+    'AAFToText.c',
+    'CFBDump.c',
+    'LibCFB.c',
+    'ProTools.c',
+    'MediaComposer.c',
+    'Resolve.c',
+    'RIFFParser.c',
+    'URIParser.c',
+    'utils.c',
+    'log.c',
 ]
 
 def options(opt):

libs/surfaces/launchpad_pro/wscript

@@ -12,9 +12,9 @@ def configure(conf):
 def build(bld):
     obj = bld(features = 'cxx cxxshlib')
     obj.source = '''
-	lppro.cc
-	interface.cc
-	gui.cc
+        lppro.cc
+        interface.cc
+        gui.cc
     '''
     obj.defines      = [ 'PACKAGE="ardour_launchpad_pro"' ]
     obj.defines     += [ 'ARDOURSURFACE_DLL_EXPORTS' ]