Results 12 issues of Release-Candidate

Just a nitpick, but I guess the Haskell rules are still young enough to be able to change the name to `prebuilt_haskell_library` to be consistent with the other ones, before...

prelude

Hi, I'm using the hidden `lsp_modeline_breadcrumbs` (or `$kak_opt_lsp_modeline_breadcrumbs`), which (for example) holds the name of the function the cursor currently is in, to e.g. run or debug a single test...