Invalid 'for' command text

```
Exception in thread "main" com.google.template.soy.base.SoySyntaxException: In file simple.soy, template helloEveryone: Invalid 'for' command text "$operand in $operands".
at com.google.template.soy.base.SoySyntaxException.createWithoutMetaInfo(SoySyntaxException.java:52)
at com.google.template.soy.soytree.ForNode.(ForNode.java:77)
at com.google.template.soy.soyparse.TemplateParser.ForStmt(TemplateParser.java:2289)
at com.google.template.soy.soyparse.TemplateParser.Stmt(TemplateParser.java:1698)
at com.google.template.soy.soyparse.TemplateParser.TemplateBlock(TemplateParser.java:1654)
at com.google.template.soy.soyparse.TemplateParser.TemplateContentInput(TemplateParser.java:1451)
at com.google.template.soy.soyparse.TemplateParser.parseTemplateContent(TemplateParser.java:265)
at com.google.template.soy.soyparse.SoyFileParser.Template(SoyFileParser.java:326)
at com.google.template.soy.soyparse.SoyFileParser.SoyFile(SoyFileParser.java:277)
at com.google.template.soy.soyparse.SoyFileParser.parseSoyFile(SoyFileParser.java:192)
at com.google.template.soy.soyparse.SoyFileSetParser.parseSoyFileHelper(SoyFileSetParser.java:266)
at com.google.template.soy.soyparse.SoyFileSetParser.parseWithVersions(SoyFileSetParser.java:213)
at com.google.template.soy.soyparse.SoyFileSetParser.parse(SoyFileSetParser.java:173)
at com.google.template.soy.SoyFileSet.compileToJsSrcFiles(SoyFileSet.java:921)
at com.google.template.soy.SoyToJsSrcCompiler.execMain(SoyToJsSrcCompiler.java:303)
at com.google.template.soy.SoyToJsSrcCompiler.main(SoyToJsSrcCompiler.java:243)
```