Use Courier as the default font for specs

Fixes #323

spec/app/editor-spec.coffee

@@ -558,7 +558,7 @@ describe "Editor", ->
 
         lineHeightBefore = editor.lineHeight
         charWidthBefore = editor.charWidth
-        config.set("editor.fontFamily", "Courier")
+        config.set("editor.fontFamily", "Consolas")
         editor.setCursorScreenPosition [5, 6]
         expect(editor.charWidth).not.toBe charWidthBefore
         expect(editor.getCursorView().position()).toEqual { top: 5 * editor.lineHeight, left: 6 * editor.charWidth }
@@ -618,9 +618,9 @@ describe "Editor", ->
 
       it "updates the gutter width and font size", ->
         rootView.attachToDom()
-        config.set("editor.fontSize", 16 * 4)
-        expect(editor.gutter.css('font-size')).toBe "#{16 * 4}px"
-        expect(editor.gutter.width()).toBe(64 + editor.gutter.calculateLineNumberPadding())
+        config.set("editor.fontSize", 20)
+        expect(editor.gutter.css('font-size')).toBe "20px"
+        expect(editor.gutter.width()).toBe(editor.charWidth * 2 + editor.gutter.calculateLineNumberPadding())
 
       it "updates lines if there are unrendered lines", ->
         editor.attachToDom(heightInLines: 5)

spec/spec-helper.coffee

@@ -43,6 +43,7 @@ beforeEach ->
   window.config = new Config()
   spyOn(config, 'load')
   spyOn(config, 'save')
+  config.set "editor.fontFamily", "Courier"
   config.set "editor.fontSize", 16
   config.set "editor.autoIndent", false
   config.set "core.disabledPackages", ["package-that-throws-an-exception"]

src/packages/wrap-guide/spec/wrap-guide-spec.coffee

@@ -31,7 +31,8 @@ describe "WrapGuide", ->
     it "updates the wrap guide position", ->
       initial = wrapGuide.position().left
       expect(initial).toBeGreaterThan(0)
-      rootView.trigger('window:increase-font-size')
+      fontSize = config.get("editor.fontSize")
+      config.set("editor.fontSize", fontSize * 2)
       expect(wrapGuide.position().left).toBeGreaterThan(initial)
       expect(wrapGuide).toBeVisible()