Vimwiki: Don't conceal one-character markers

[Ram-Z]

Add an option to disable conceiling one-char markers? I want typefaces to not be conceiled but URLs still shortened.

[pjf]

@Ram-Z : I'm walking through tickets trying to better understand them. Can you give an example of what you mean, with current and desired behaviour?

[Ram-Z]

When setting the typeface for text, the various markers are being concealed. I.e. *bold text* will simply show up as bold text rather than *bold text*, or _italic text_ as _italic text_ rather than __italic text__.

I know I can change g:vimwiki_conceallevel to disable it, but that would also disable concealing wiki links ([[This is a link source|Description of the link]] -> Description of the link), which I would like to keep.

[AlexChalk]

@pjf I think this helps usability a lot; some fonts don't support bold/italic, so if the markup is conceiled it just looks like regular text.

[ranebrown]

This would be quite easy to implement. Just create a new option and wrap these lines in an if statement using vimwiki#vars#get_global() to check the variable status. PRs are welcome!