fnameescape() called for URIs not being local files

I'm using wiki.vim with markdown files containing links to external content, like ```md Open [Google](https://www.google.com/?q=wiki%20vim) with "wiki vim" as query Send e-mail to [Bram](mailto:bram%40vim.org?subject=Bug%20in%20Vim) with subject "Bug in vim" ``` When opening the links in normal mode with `<Enter>` the `%xx` escaped will be unescaped to the correct chars BUT prefixed with a backslash ``` https://www.google.com/?q=wiki\%20vim To: bram\@vim.org Subject: Bug\ in\ Vim ```