<!--
  Note: if the issue is about documentation or the website, please file it at:
  https://github.com/reactjs/reactjs.org/issues/new
-->

**Do you want to request a *feature* or report a *bug*?**
Bug? (not a biggy - not sure if IE11 is support for development)

**What is the current behavior?**

IE11 seems to always throw a warning for hydration failures
eg

> **Warning: Prop `style` did not match. Server: "text-decoration: none;" Client: "text-decoration:none"**

Note: there is a space between the colon and none from Server, Client has no space

**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar (template for React 16: https://jsfiddle.net/Luktwrdm/, template for React 15: https://jsfiddle.net/hmbg7e9w/).**

Have a SSR rendered component, using inline styles
```
                       <a href="/page1" style={{ textDecoration: "none" }}>
                            <h1 className="splash-head">Go to Page1</h1>
                        </a>
```

Then hydrate it on IE11
`ReactDOM.hydrate(component, document.getElementById("app"));`

This **doesnt** occur in either Chrome or Firefox

**What is the expected behavior?**

No warning

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**

React: 16.1.1
Browser: IE11


let serverValue;
      const propertyInfo = getPropertyInfo(propKey);
      if (suppressHydrationWarning) {
        
      } else if (
        propKey === SUPPRESS_CONTENT_EDITABLE_WARNING ||
        propKey === SUPPRESS_HYDRATION_WARNING ||
        
        
        propKey === 'value' ||
        propKey === 'checked' ||
        propKey === 'selected'
      ) {
        
      } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
        const serverHTML = domElement.innerHTML;
        const nextHtml = nextProp ? nextProp[HTML] : undefined;
        const expectedHTML = normalizeHTML(
          domElement,
          nextHtml != null ? nextHtml : '',
        );
        if (expectedHTML !== serverHTML) {
          warnForPropDifference(propKey, serverHTML, expectedHTML);
        }
      } else if (propKey === STYLE) {
        
        extraAttributeNames.delete(propKey);
        const expectedStyle = CSSPropertyOperations.createDangerousStringForStyles(
          nextProp,