Remove exclusive_creation argument from write() function

[mgeier]

This will revert the changes from #77.
Raising an error by default is useful in some cases, but it can also be harmful in other cases.

As far as I know, in most APIs the "write" function overwrites by default.
Also, e.g., the Unix commands cp and mv by default overwrite their target.

I think it's reasonable to assume that users expect overwriting behavior, therefore we should give it to them.

Once the default is changed to overwriting behavior, the argument exclusive_creation isn't that relevant anymore and it should be removed.

If users want to make sure that a file is not overwritten, they'll either have to check the existence first (e.g. with os.path.exists()) or they can use f = SoundFile(..., mode='x').

[mgeier]

I added a commit that should implement the changes: 1ebcb89

[bastibe]

Shouldn't this change a test as well? If not, it should have ;-)

Anyway, looks good to me.

[mgeier]

You're right, I forgot the tests, my bad!
There are actually 2 tests which fail now.

I'll fix the tests ...

[mgeier]

I amended my commit, fixing one test and removing another (d39b332).

There is already a test case test_if_open_with_mode_w_truncates() which tests if 'w' and 'w+' truncate "normal" files, so I guess we don't have to make a separate test for sf.write(), right?

I hope now it's OK?

[bastibe]

Looks good to me. If you're happy with it, merge.