Add // prettier-ignore comments to prevent re-formatting of certain data structures

There's a fair number of (primarily) `Array`s/`TypedArray`s whose formatting we don't want disturb, since in many cases that would lead to the code becoming much more difficult to read and/or break existing inline comments.

*Please note:* It may be a good idea to look through these cases individually, and possibly re-write some of the them (especially the `String` ones) to reduce the need for all of these ignore commands.

src/display/canvas.js

@@ -198,6 +198,7 @@ function compileType3Glyph(imgData) {
   var width = imgData.width, height = imgData.height;
   var i, j, j0, width1 = width + 1;
   var points = new Uint8Array(width1 * (height + 1));
+  // prettier-ignore
   var POINT_TYPES =
       new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);