src/nodes/arrays.js in prettier-0.22.0 vs src/nodes/arrays.js in prettier-1.0.0.pre.rc1

@@ -7,10 +7,12 @@
   join,
   line,
   softline
 } = require("../prettier");
 
+const { getTrailingComma } = require("../utils");
+
 // Checks that every argument within this args node is a string_literal node
 // that has no spaces or interpolations. This means we're dealing with an array
 // that looks something like:
 //
 //     ['a', 'b', 'c']
@@ -35,13 +37,14 @@
     // interpolated, so again we can return false.
     if (part.type !== "@tstring_content") {
       return false;
     }
 
-    // Finally, verify that the string doesn't contain a space or an escape
-    // character so that we know it can be put into a string literal array.
-    return !part.body.includes(" ") && !part.body.includes("\\");
+    // Finally, verify that the string doesn't contain a space, an escape
+    // character, or brackets so that we know it can be put into a string
+    // literal array.
+    return !/[\s\\[\]]/.test(part.body);
   });
 }
 
 // Checks that every argument within this args node is a symbol_literal node (as
 // opposed to a dyna_symbol) so it has no interpolation. This means we're
@@ -151,10 +154,10 @@
       "[",
       indent(
         concat([
           softline,
           join(concat([",", line]), path.call(print, "body", 0)),
-          opts.addTrailingCommas ? ifBreak(",", "") : ""
+          getTrailingComma(opts) ? ifBreak(",", "") : ""
         ])
       ),
       softline,
       "]"
     ])