src/nodes/strings.js in prettier-0.14.0 vs src/nodes/strings.js in prettier-0.15.0

@@ -38,11 +38,11 @@
 };
 
 const quotePattern = new RegExp("\\\\([\\s\\S])|(['\"])", "g");
 
 const makeString = (content, enclosingQuote) => {
-  const otherQuote = enclosingQuote === '"' ? "'" : enclosingQuote;
+  const otherQuote = enclosingQuote === '"' ? "'" : '"';
 
   // Escape and unescape single and double quotes as needed to be able to
   // enclose `content` with `enclosingQuote`.
   return content.replace(quotePattern, (match, escaped, quote) => {
     if (escaped === otherQuote) {
@@ -137,14 +137,26 @@
   symbol: prefix(":"),
   symbol_literal: concatBody,
   word_add: concatBody,
   word_new: empty,
   xstring: makeList,
-  xstring_literal: (path, opts, print) =>
-    group(
+  xstring_literal: (path, opts, print) => {
+    const parts = path.call(print, "body", 0);
+
+    if (typeof parts[0] === "string") {
+      parts[0] = parts[0].replace(/^\s+/, "");
+    }
+
+    const lastIndex = parts.length - 1;
+    if (typeof parts[lastIndex] === "string") {
+      parts[lastIndex] = parts[lastIndex].replace(/\s+$/, "");
+    }
+
+    return group(
       concat([
         "`",
-        indent(concat([softline, join(softline, path.call(print, "body", 0))])),
+        indent(concat([softline, join(softline, parts)])),
         concat([softline, "`"])
       ])
-    )
+    );
+  }
 };