Never print blank lines with spaces

src/pp.js

@@ -239,6 +239,11 @@ function print(w, doc) {
               }
               // fallthrough
             case MODE_BREAK:
+              const lastString = out[out.length - 1];
+              if(lastString.match(/^\s*\n\s*$/)) {
+                out[out.length - 1] = "\n";
+              }
+
               if(doc.literal) {
                 out.push("\n");
                 pos = 0;

src/printer.js

@@ -1680,7 +1680,7 @@ function printStatementSequence(path, options, print) {
       parts.push(stmtPrinted);
 
       if (addSpacing && !isLastStatement(stmtPath)) {
-        parts.push(literalline);
+        parts.push(hardline);
       }
 
       printed.push(concat(parts));