return and export default can now accept implicit objects (#4532)

src/lexer.coffee

@@ -378,7 +378,7 @@ exports.Lexer = class Lexer
       return indent.length
 
     if size > @indent
-      if noNewlines
+      if noNewlines or @tag() is 'RETURN'
         @indebt = size - @indent
         @suppressNewlines()
         return indent.length
@@ -430,7 +430,7 @@ exports.Lexer = class Lexer
     this
 
   # Matches and consumes non-meaningful whitespace. Tag the previous token
-  # as being "spaced", because there are some cases where it makes a difference.
+  # as being “spaced”, because there are some cases where it makes a difference.
   whitespaceToken: ->
     return 0 unless (match = WHITESPACE.exec @chunk) or
                     (nline = @chunk.charAt(0) is '\n')
@@ -761,7 +761,7 @@ exports.Lexer = class Lexer
     LINE_CONTINUER.test(@chunk) or
     @tag() in ['\\', '.', '?.', '?::', 'UNARY', 'MATH', 'UNARY_MATH', '+', '-',
                '**', 'SHIFT', 'RELATION', 'COMPARE', '&', '^', '|', '&&', '||',
-               'BIN?', 'THROW', 'EXTENDS']
+               'BIN?', 'THROW', 'EXTENDS', 'DEFAULT']
 
   formatString: (str, options) ->
     @replaceUnicodeCodePointEscapes str.replace(STRING_OMIT, '$1'), options

src/rewriter.coffee

@@ -14,11 +14,7 @@ generate = (tag, value, origin) ->
 
 # The **Rewriter** class is used by the [Lexer](lexer.html), directly against
 # its internal array of tokens.
-class exports.Rewriter
-
-  # Helpful snippet for debugging:
-  #
-  #     console.log (t[0] + '/' + t[1] for t in @tokens).join ' '
+exports.Rewriter = class Rewriter
 
   # Rewrite the token stream in multiple passes, one logical filter at
   # a time. This could certainly be changed into a single pass through the
@@ -26,6 +22,8 @@ class exports.Rewriter
   # like this. The order of these passes matters -- indentation must be
   # corrected before implicit parentheses can be wrapped around blocks of code.
   rewrite: (@tokens) ->
+    # Helpful snippet for debugging:
+    #     console.log (t[0] + '/' + t[1] for t in @tokens).join ' '
     @removeLeadingNewlines()
     @closeOpenCalls()
     @closeOpenIndexes()
@@ -186,7 +184,7 @@ class exports.Rewriter
       # Don't end an implicit call on next indent if any of these are in an argument
       if inImplicitCall() and tag in ['IF', 'TRY', 'FINALLY', 'CATCH',
         'CLASS', 'SWITCH']
-        stack.push ['CONTROL', i, ours: true]
+        stack.push ['CONTROL', i, ours: yes]
         return forward(1)
 
       if tag is 'INDENT' and inImplicit()