Fix inconsistent spacing and trailing commas in objects in remaining src/ files, so we can enable the comma-dangle and object-curly-spacing ESLint rules later on

http://eslint.org/docs/rules/comma-dangle
http://eslint.org/docs/rules/object-curly-spacing

Given that we currently have quite inconsistent object formatting, fixing this in *one* big patch probably wouldn't be feasible (since I cannot imagine anyone wanting to review that); hence I've opted to try and do this piecewise instead.

Please note: This patch was created automatically, using the ESLint `--fix` command line option. In a couple of places this caused lines to become too long, and I've fixed those manually; please refer to the interdiff below for the only hand-edits in this patch.

```diff
diff --git a/src/display/canvas.js b/src/display/canvas.js
index 5739f6f2..4216b2d2 100644
--- a/src/display/canvas.js
+++ b/src/display/canvas.js
@@ -2071,7 +2071,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
       var map = [];
       for (var i = 0, ii = positions.length; i < ii; i += 2) {
         map.push({ transform: [scaleX, 0, 0, scaleY, positions[i],
-                 positions[i + 1]], x: 0, y: 0, w: width, h: height, });
+                   positions[i + 1]], x: 0, y: 0, w: width, h: height, });
       }
       this.paintInlineImageXObjectGroup(imgData, map);
     },
diff --git a/src/display/svg.js b/src/display/svg.js
index 9eb05dfa..2aa21482 100644
--- a/src/display/svg.js
+++ b/src/display/svg.js
@@ -458,7 +458,11 @@ SVGGraphics = (function SVGGraphicsClosure() {

       for (var x = 0; x < fnArrayLen; x++) {
         var fnId = fnArray[x];
-        opList.push({ 'fnId': fnId, 'fn': REVOPS[fnId], 'args': argsArray[x], });
+        opList.push({
+          'fnId': fnId,
+          'fn': REVOPS[fnId],
+          'args': argsArray[x],
+        });
       }
       return opListToTree(opList);
     },
```

src/display/pattern_helper.js

@@ -41,9 +41,9 @@ ShadingIRs.RadialAxial = {
           grad.addColorStop(c[0], c[1]);
         }
         return grad;
-      }
+      },
     };
-  }
+  },
 };
 
 var createMeshCanvas = (function createMeshCanvasClosure() {
@@ -174,7 +174,7 @@ var createMeshCanvas = (function createMeshCanvasClosure() {
       offsetX: -offsetX,
       offsetY: -offsetY,
       scaleX: 1 / scaleX,
-      scaleY: 1 / scaleY
+      scaleY: 1 / scaleY,
     };
 
     var paddedWidth = width + BORDER_SIZE * 2;
@@ -269,9 +269,9 @@ ShadingIRs.Mesh = {
                   temporaryPatternCanvas.scaleY);
 
         return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat');
-      }
+      },
     };
-  }
+  },
 };
 
 ShadingIRs.Dummy = {
@@ -280,9 +280,9 @@ ShadingIRs.Dummy = {
       type: 'Pattern',
       getPattern: function Dummy_fromIR_getPattern() {
         return 'hotpink';
-      }
+      },
     };
-  }
+  },
 };
 
 function getShadingPatternFromIR(raw) {
@@ -296,7 +296,7 @@ function getShadingPatternFromIR(raw) {
 var TilingPattern = (function TilingPatternClosure() {
   var PaintType = {
     COLORED: 1,
-    UNCOLORED: 2
+    UNCOLORED: 2,
   };
 
   var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough
@@ -428,7 +428,7 @@ var TilingPattern = (function TilingPatternClosure() {
       this.scaleToContext();
 
       return ctx.createPattern(temporaryPatternCanvas, 'repeat');
-    }
+    },
   };
 
   return TilingPattern;