Fix errors reported by the keyword-spacing ESLint rule

http://eslint.org/docs/rules/keyword-spacing

src/core/chunked_stream.js

@@ -568,7 +568,7 @@ var ChunkedStreamManager = (function ChunkedStreamManagerClosure() {
       if (this.pdfNetworkStream) {
         this.pdfNetworkStream.cancelAllRequests('abort');
       }
-      for(var requestId in this.promisesByRequest) {
+      for (var requestId in this.promisesByRequest) {
         var capability = this.promisesByRequest[requestId];
         capability.reject(new Error('Request was aborted'));
       }

src/core/pdf_manager.js

@@ -210,7 +210,7 @@ var NetworkPdfManager = (function NetworkPdfManagerClosure() {
               result = value;
             }
             resolve(result);
-          } catch(e) {
+          } catch (e) {
             if (!(e instanceof MissingDataException)) {
               reject(e);
               return;

src/core/type1_parser.js

@@ -550,7 +550,7 @@ var Type1Parser = (function Type1ParserClosure() {
             this.getToken(); // read in 'dict'
             this.getToken(); // read in 'dup'
             this.getToken(); // read in 'begin'
-            while(true) {
+            while (true) {
               token = this.getToken();
               if (token === null || token === 'end') {
                 break;