Update to avoid self cursor been overlapped by other cursors

Author: jackycute

lib/codemirror.css

@@ -326,7 +326,7 @@ div.CodeMirror-dragcursors {
 
 div.CodeMirror-other-cursors {
   position:relative;
-  z-index:3;
+  z-index: 3;
 }
 
 .CodeMirror-selected { background: #d9d9d9; }

src/display/Display.js

@@ -28,7 +28,7 @@ export function Display(place, doc, input) {
   // When lines outside of the viewport are measured, they are drawn in this.
   d.lineMeasure = elt("div", null, "CodeMirror-measure")
   // Wraps everything that needs to exist inside the vertically-padded coordinate system
-  d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.otherCursorsDiv, d.lineDiv],
+  d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.otherCursorsDiv, d.selectionDiv, d.cursorDiv, d.lineDiv],
                     null, "position: relative; outline: none")
   let lines = eltP("div", [d.lineSpace], "CodeMirror-lines")
   // Moved around its parent to cover visible view.