major cleaing haul. Finish changing 2 spaces -> 4 spaces. Change line continuations due to long function args to vertical alignment. Change line continuations due to stringing functions to adding parentheses, followed by vertical alignment. Change line continuations due to data structures (dictionaries, lists, tuples) to normal single-indent nesting with one element per line. Change string concatenation/formating to use .format and .join (instead of +). Try to be consistent about single quote for field names, double quote for strings.