print in pygo causes: NameError: name 'values' is not defined
Adding print to the Python causes:

```py
/Users/john.vandenberg/python/py2many/tests/test_cli.py:66:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/Users/john.vandenberg/python/py2many/py2many/cli.py:160: in main
    _process_once(settings, source, outdir)
/Users/john.vandenberg/python/py2many/py2many/cli.py:111: in _process_once
    f.write(transpile(source_data, settings.transpiler))
/Users/john.vandenberg/python/py2many/py2many/cli.py:43: in transpile
    code = transpiler.visit(tree) + "\n"
/Users/john.vandenberg/python/py2many/py2many/clike.py:61: in visit
    return super(CLikeTranspiler, self).visit(node)
/usr/local/Caskroom/miniconda/base/lib/python3.8/ast.py:363: in visit
    return visitor(node)
/Users/john.vandenberg/python/py2many/pygo/transpiler.py:296: in visit_Module
    buf += [self.visit(b) for b in node.body]
/Users/john.vandenberg/python/py2many/pygo/transpiler.py:296: in <listcomp>
    buf += [self.visit(b) for b in node.body]
/Users/john.vandenberg/python/py2many/py2many/clike.py:61: in visit
    return super(CLikeTranspiler, self).visit(node)
/usr/local/Caskroom/miniconda/base/lib/python3.8/ast.py:363: in visit
    return visitor(node)
/Users/john.vandenberg/python/py2many/pygo/transpiler.py:61: in visit_FunctionDef
    body = "\n".join([self.visit(n) for n in node.body])
/Users/john.vandenberg/python/py2many/pygo/transpiler.py:61: in <listcomp>
    body = "\n".join([self.visit(n) for n in node.body])
/Users/john.vandenberg/python/py2many/py2many/clike.py:61: in visit
    return super(CLikeTranspiler, self).visit(node)
/usr/local/Caskroom/miniconda/base/lib/python3.8/ast.py:363: in visit
    return visitor(node)
/Users/john.vandenberg/python/py2many/pygo/transpiler.py:206: in visit_For
    buf.extend([self.visit(c) for c in node.body])
/Users/john.vandenberg/python/py2many/pygo/transpiler.py:206: in <listcomp>
    buf.extend([self.visit(c) for c in node.body])
/Users/john.vandenberg/python/py2many/py2many/clike.py:61: in visit
    return super(CLikeTranspiler, self).visit(node)
/usr/local/Caskroom/miniconda/base/lib/python3.8/ast.py:363: in visit
    return visitor(node)
/Users/john.vandenberg/python/py2many/pygo/transpiler.py:218: in visit_Expr
    return self.visit(node.value)
/Users/john.vandenberg/python/py2many/py2many/clike.py:61: in visit
    return super(CLikeTranspiler, self).visit(node)
/usr/local/Caskroom/miniconda/base/lib/python3.8/ast.py:363: in visit
    return visitor(node)
/Users/john.vandenberg/python/py2many/pygo/transpiler.py:192: in visit_Call
    ret = self._dispatch(node, fname, vargs)
/Users/john.vandenberg/python/py2many/pygo/transpiler.py:170: in _dispatch
    return dispatch_map[fname](node, vargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <pygo.transpiler.GoTranspiler object at 0x7f86705dc4c0>, node = <_ast.Call object at 0x7f86502d2f40>, vargs = ['color']

    def visit_print(self, node, vargs: List[str]) -> str:
        placeholders = []
        for n in node.args:
            placeholders.append("%v ")
        self._usings.add("fmt")
        return 'fmt.Printf("{0}\n",{1})'.format(
>           "".join(placeholders), ", ".join(values)
        )
E       NameError: name 'values' is not defined
```