UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36

Steps to reproduce the problem:
1. Load the font "Exo 2" for example
2. Try to use it with Chrome
3. 

What is the expected behavior?
<font face="Times New Roman">Hello World</font> works
<font face="Exo 2">Hello World</font> should work as well

What went wrong?
If a font name contains a blank followed by a numerical digit, it requires an extra quoting.

<font face="Exo 2">Hello World</font>
does not work, but

<font face="'Exo 2'">Hello World</font>
works.

The problem is not only related to the font tag but shows up in all cases where you provide a font family to Chrome.

Sometimes it is difficult to provide the extra quoting. The following piece of code fails with fonts like "Exo 2":

var li = $( "<li>" ), wrapper = $( "<div>",
{ text: item.label,
  "style" : "font-family:'"+ (item.value || Roboto')+"'"} );

Did this work before? No 

Chrome version: 60.0.3112.113  Channel: n/a
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

Firefox does not have this issue.

"Exo 2", "Goudy Bookletter 1911" and all the Slabo fonts "Slabo 13px", etc. are on the Google font page:
https://fonts.google.com/?query=exo&selection.family=Exo+2

Of course, 
<font face="Exo+2">Hello World</font>
does not work either