Make the font size 16 in specs, because a few specs depend on it

spec/app/editor-spec.coffee

@@ -547,13 +547,10 @@ describe "Editor", ->
 
       it "updates the gutter width and font size", ->
         rootView.attachToDom()
-        originalFontSize = editor.getFontSize()
-        originalGutterWidth = editor.gutter.width()
-
-        config.editor.fontSize = originalFontSize * 4
+        config.editor.fontSize = 16 * 4
         config.update()
-        expect(editor.gutter.css('font-size')).toBe "#{originalFontSize * 4}px"
-        expect(editor.gutter.width()).toBe(originalGutterWidth * 4)
+        expect(editor.gutter.css('font-size')).toBe "#{16 * 4}px"
+        expect(editor.gutter.width()).toBe(141)
 
       it "updates lines if there are unrendered lines", ->
         editor.attachToDom(heightInLines: 5)

spec/spec-helper.coffee

@@ -26,6 +26,7 @@ beforeEach ->
   spyOn(config, 'load')
   spyOn(config, 'save')
   config.assignDefaults()
+  config.editor.fontSize = 16
 
   # make editor display updates synchronous
   spyOn(Editor.prototype, 'requestDisplayUpdate').andCallFake -> @updateDisplay()