more jsx whitespace issues

[monsanto]

This PR appears to be the only place JSX whitespace rules are documented.

example 1

<p>foo <a href="test">bar</a> baz</p>

# 6to5  test.jsx
"use strict";

React.createElement("p", null, "foo ", React.createElement("a", {
  href: "test"
}, "bar"), "baz"); # note lack of space before baz

# jsx test.jsx
React.createElement("p", null, "foo ", React.createElement("a", {href: "test"}, "bar"), " baz")

example 2

<p>
    foo
    <a href="test">bar</a>
    baz
</p>

# 6to5 test.jsx    
"use strict";

React.createElement("p", null, "\n    Test\n    ", React.createElement("a", {
  href: "test"
}, "test"), "test\n");

# jsx test.jsx
React.createElement("p", null, 
    "Test", 
    React.createElement("a", {href: "test"}, "test"), 
    "test"
)

[sebmck]

Thanks! Should be fixed as of 1.12.15