Made tab widths 4 spaces, and 80 columned the code

lib/python/DocumentTemplate/DT_Let.py

@@ -126,7 +126,8 @@ class Let:
 
         for i in range(len(args)):
             name,expr = args[i]
-			if expr[:1]=='"' and expr[-1:]=='"' and len(expr) > 1: # expr shorthand
+            if expr[:1]=='"' and expr[-1:]=='"' and len(expr) > 1:
+				# expr shorthand
                 expr=expr[1:-1]
                 try: args[i] = name, Eval(expr, expr_globals).eval
                 except SyntaxError, v: