Spacing multiple operators.

lib/nodes.js

@@ -1291,7 +1291,7 @@
     };
     Op.prototype.compileUnary = function(o) {
       var _ref2, parts, space;
-      space = (_ref2 = this.operator, __indexOf.call(this.PREFIX_OPERATORS, _ref2) >= 0) ? ' ' : '';
+      space = (_ref2 = this.operator, __indexOf.call(this.PREFIX_OPERATORS, _ref2) >= 0) || this.first instanceof Op ? ' ' : '';
       parts = [this.operator, space, this.first.compile(o, LVL_OP)];
       return (this.flip ? parts.reverse() : parts).join('');
     };

src/nodes.coffee

@@ -1108,7 +1108,7 @@ exports.Op = class Op extends Base
 
   # Compile a unary **Op**.
   compileUnary: (o) ->
-    space = if @operator in @PREFIX_OPERATORS then ' ' else ''
+    space = if @operator in @PREFIX_OPERATORS or @first instanceof Op then ' ' else ''
     parts = [@operator, space, @first.compile(o, LVL_OP)]
     (if @flip then parts.reverse() else parts).join ''
 

test/test_operations.coffee

@@ -165,3 +165,7 @@ ok a is 579
 a = "1#{2}3" +
 "456"
 ok a is '123456'
+
+
+# Multiple operators should space themselves.
+ok + +1 is - -1