Make `Type1Font` more class-like, by adding closure

*Note:* Ignoring whitespace should simplify reviewing a great deal.

src/core/fonts.js

@@ -3637,8 +3637,9 @@ var CFFStandardStrings = [
 ];
 
 // Type1Font is also a CIDFontType0.
-var Type1Font = function Type1Font(name, file, properties) {
-  // Some bad generators embed pfb file as is, we have to strip 6-byte headers.
+var Type1Font = (function Type1FontClosure() {
+  function Type1Font(name, file, properties) {
+    // Some bad generators embed pfb file as is, we have to strip 6-byte header.
     // Also, length1 and length2 might be off by 6 bytes as well.
     // http://www.math.ubc.ca/~cass/piscript/type1.pdf
     var PFB_HEADER_SIZE = 6;
@@ -3679,7 +3680,7 @@ var Type1Font = function Type1Font(name, file, properties) {
     this.data = this.wrap(name, type2Charstrings, this.charstrings,
                           subrs, properties);
     this.seacs = this.getSeacs(data.charstrings);
-};
+  }
 
   Type1Font.prototype = {
     get numGlyphs() {
@@ -3762,7 +3763,8 @@ Type1Font.prototype = {
       return type2Subrs;
     },
 
-  wrap: function Type1Font_wrap(name, glyphs, charstrings, subrs, properties) {
+    wrap: function Type1Font_wrap(name, glyphs, charstrings, subrs,
+                                  properties) {
       var cff = new CFF();
       cff.header = new CFFHeader(1, 0, 4, 4);
 
@@ -3863,6 +3865,9 @@ Type1Font.prototype = {
     }
   };
 
+  return Type1Font;
+})();
+
 var CFFFont = (function CFFFontClosure() {
   function CFFFont(file, properties) {
     this.properties = properties;