How do I fix my failed PRs?

[MoonlightSentinel]

On Sunday, 2 February 2020 at 08:54:02 UTC, mark wrote:
> However, four have not been accepted, apparently for technical 
> reasons. But I don't understand what's wrong or what I need to 
> do to fix them. (I'm not very knowledgeable about github.)

The Travis log suggest that your PRs contain some whitespace 
errors:

> The command "grep -nr --include \*.md '\s$' . ; test $? -eq 1" 
> exited with 1

You could try to execute the ggrep command locally to identify 
lines containing possible errors.

PS: Feel free to comment on your PR directly s.t. 
reviewers/bypassers can see that you could use some assistance.