docs: misc

fix https://github.com/neovim/neovim.github.io/issues/419

Co-authored-by: Rob Pilling <robpilling@gmail.com>

src/nvim/options.lua

@@ -5715,7 +5715,7 @@ local options = {
         behaves like CTRL-C was typed.
         Running into the limit often means that the pattern is very
         inefficient or too complex.  This may already happen with the pattern
-        "\(.\)*" on a very long line.  ".*" works much better.
+        `\(.\)*` on a very long line.  `.*` works much better.
         Might also happen on redraw, when syntax rules try to match a complex
         text structure.
         Vim may run out of memory before hitting the 'maxmempattern' limit, in