Hi!

Just noticed there's a bug in the format parser when writing SAS xport files.

xport_write_variables is using sscanf to pull the format name, width and decimals:

Because there are no spaces between the name and the other bits the whole string is being consumed as the format name by %s, and width and decimals are never set. In many cases this is still interpreted correctly from the name alone, but others have issues, for e.g.:

• COMMA10.3 - longer than 8 chars, so is cut off when storing the format name
• 10.3 - fails with an invalid name warning in SAS

It seems like a bit of a pain to parse - the format is <name><width>.<decimal>, but width and decimal and the period between them are all optional. Name follows the SAS naming rules, with the additional requirement that it can't end in a number.