#181 %.f fails with unexpected placeholder

[ashwalk33r]

fix #181

change regex matching precision in order to reflect C documentation:
"if the period is specified without an explicit value for precision, 0 is assumed"

[alexei]

Please provide unit tests

[ashwalk33r]

To be honest I do not know sprintf - what types of input are good to include in test? Can you guide me a little?

Basicly I change how ".precision" is interpreted - from digit(s) to digit(s) or 0 - what would be enough coverage in unit tests for that?

Idea 1
take existing precision tests (there is few) and change their precision to nothing and compare with .0

Idea 2
http://www.cplusplus.com/reference/cstdio/printf/
cover every case described in ".precision | description" section

Idea 3
Any place already containing tests that you know about (can be in diff language) that we can inspire from?

[ashwalk33r]

Best tests I could think of added.

[ricksterhd123]

Bump

[ashwalk33r]

bump?

[ricksterhd123]

bump?

Can't remember why but I think this PR fixed some issue on another repo. Test still not good enough? It's been months.

[ashwalk33r]

alexei doesnt care apperantly

[d0sboots]

Can't remember why but I think this PR fixed some issue on another repo. Test still not good enough? It's been months.

The other repo/issue is fengari-lua/fengari#147 (still blocked on this, 5 years later). Just ran into this one myself. XD