Fixing lint errors

src/js/parser/javascript.js

@@ -84,7 +84,7 @@ export default class Parser {
       // Once rendering is complete, the rendered expression is positioned and
       // the SVG resized to create some padding around the image contents.
       .then(result => {
-        var box = result.getBBox();
+        let box = result.getBBox();
 
         result.transform(Snap.matrix()
           .translate(10 - box.x, 10 - box.y));

src/js/parser/javascript/literal.js

@@ -10,7 +10,7 @@ export default {
   _render() {
     return this.renderLabel(['\u201c', this.literal, '\u201d'])
       .then(label => {
-        var spans = label.selectAll('tspan');
+        let spans = label.selectAll('tspan');
 
         // The quote marks get some styling to lighten their color so they are
         // distinct from the actual literal value.

src/js/parser/javascript/match_fragment.js

@@ -29,7 +29,7 @@ export default {
   _render() {
     return this.content.render(this.container.group())
       .then(() => {
-        var box, paths;
+        let box, paths;
 
         // Contents must be transformed based on the repeat that is applied.
         this.content.transform(this.repeat.contentPosition);

src/js/parser/javascript/node.js

@@ -121,7 +121,7 @@ export default class Node {
 
     return this.deferredStep()
       .then(() => {
-        var box = text.getBBox(),
+        let box = text.getBBox(),
             margin = 5;
 
         text.transform(Snap.matrix()
@@ -161,7 +161,7 @@ export default class Node {
 
     return this.deferredStep()
       .then(() => {
-        var labelBox = label.getBBox(),
+        let labelBox = label.getBBox(),
             contentBox = content.getBBox();
 
         label.transform(Snap.matrix()

src/js/parser/javascript/regexp.js

@@ -19,7 +19,7 @@ export default {
       return match.render(matchContainer.group());
     }))
       .then(() => {
-        var containerBox,
+        let containerBox,
             paths;
 
         // Space matches vertically in the match container.

src/js/parser/javascript/root.js

@@ -24,7 +24,7 @@ export default {
     // Render the content of the regular expression.
     return this.regexp.render(this.container.group())
       .then(() => {
-        var box;
+        let box;
 
         // Move rendered regexp to account for flag label and to allow for
         // decorative elements.