No bug - Fixup whitespaces in build/moz.configure/{init,old}.configure. r=me

build/moz.configure/init.configure

@@ -99,7 +99,7 @@ def virtualenv_python(env_python, build_env, mozconfig):
     import sys
     import subprocess
     from mozbuild.virtualenv import (
-	VirtualenvManager,
+        VirtualenvManager,
         verify_python_version,
     )
 

build/moz.configure/old.configure

@@ -375,11 +375,11 @@ def old_configure(prepare_configure, all_options, *options):
     raw_config = {}
     encoding = 'mbcs' if sys.platform == 'win32' else 'utf-8'
     with codecs.open('config.data', 'r', encoding) as fh:
-	code = compile(fh.read(), 'config.data', 'exec')
-	# Every variation of the exec() function I tried led to:
-	# SyntaxError: unqualified exec is not allowed in function 'main' it
-	# contains a nested function with free variables
-	exec code in raw_config
+        code = compile(fh.read(), 'config.data', 'exec')
+        # Every variation of the exec() function I tried led to:
+        # SyntaxError: unqualified exec is not allowed in function 'main' it
+        # contains a nested function with free variables
+        exec code in raw_config
 
     # Ensure all the flags known to old-configure appear in the
     # @old_configure_options above.