Added subtract_time function, with tests and example usage.

erlsci / iso8601

An ISO 8601 date formating and parsing library for Erlang

MIT License

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Closed grantwinney closed 6 years ago

grantwinney commented 6 years ago

This is a fix for issue #38.

Added a new subtract_time function, to complement the existing add_time function.
Added a few EUnit tests around both functions.
Updated the readme file with a sample usage, similar to the add_time function.

oubiwann commented 6 years ago

This has some conflicts with the latest merge; your change looks good, so I’ll merge when those are fixed.

grantwinney commented 6 years ago

Sorry about that. Guess I was working on an outdated fork. I fetched the latest changes and merged them.

oubiwann commented 6 years ago

No worries! You were fine; the conflicts only happened after I merged an older PR into master.