'Tooltip' word causes syntax error

In my code I notice that the use of a variable named "ToolTip" would cause an error in the syntax detection and color the rest of the code as a String. Let's say, in this example, the first apostrophe would not be detected and then the semicolon and "//bar" appear to bee in a string. 

```
ToolTip = new class'Foo';
//bar'bar
```
