Improve error message when token contains leading or trailing whitespace.

[jgehrcke]

GHRS_TESTING_DATA_REPO_DIR is unset
+ git ls-remote --exit-code --heads https://ghactions: ***@github.com/CARV-ICS-FORTH/frisbee.git github-repo-stats
use 'git ls-remote' to check if data branch exists in data repo
fatal: unable to access 'https://ghactions:/': Could not resolve host: ghactions

https://github.com/CARV-ICS-FORTH/frisbee/actions/runs/2989864452/jobs/4793820289

Based on the log output ...https://ghactions: ***@github.com... I believe what happened is that the API token was pasted with a leading space character. The resulting error message Could not resolve host: ghactions probably was so misleading to the user that they gave up. We should give them the pointer that the provided API token appears to be invalid.

[hhollandmoritz]

Thanks for your work on this! It's a wonderful tool.

Just popping by to say that I had this error as well. In my case, I solved it by removing the two lines that trailed the yml file from the tutorial on the wiki. Otherwise everything went very smoothly.

https://github.com/jgehrcke/github-repo-stats/wiki/Tutorial#step-2-add-workflow-file-to-default-branch

[jgehrcke]

Oh, thank you so much for the kind feedback, Hannah!