add c variant for old str formatting

[andgrew]

Its important for example for:
print(datetime.now())
And may be checked in this way:
"%c" % 107 # gives letter 'k'
and this:
"%c" % "k" # gives letter 'k' too

[andgrew]

I see, that it fails. Thinking its due to a different text editor settings. But cant check it locally now. Command 'python setup.py develop' fails with message 'unsupported Go version , Grumpy requires at least 1.9...'. But my go version is go1.10.3 linux/amd64.

[alanjds]

I see, that it fails.

Yeah, but is about formating: gofmt is a bit picky, but can fix the code for you: https://travis-ci.org/grumpyhome/grumpy/jobs/463174672#L847

gofmt found errors, run: gofmt -w /home/travis/gopath/src/github.com/grumpyhome/grumpy/grumpy-runtime-src/runtime/*.go

Just run the provided line gofmt -w grumpy-runtime-src/runtime/*.go and it should fix.

Command 'python setup.py develop' fails with message 'unsupported Go version , Grumpy requires at least 1.9...'. But my go version is go1.10.3 linux/amd64.

Strange. What linux are you using? How you installed Go? Can you please share the output of $ which go; go version; env | grep GO ?

[alanjds]

Thanks for the contribution.

I will add a test before merging, but you can do it to make the merge occur sooner.

You can take a look on str_test.go if possible?

[andgrew]

Yes, I wanted to add a test. I got it how the tests work. I'm running on another system now. Further I will understand, why I had problem in windows linux subsystem (Debian).

[alanjds]

Thanks for the test.

I wanted to explore the Windows Linux Subsystem too. Good to know that it messed with your Go versions.

In theory it should work and no Windows port would be needed at all, but lets see...