Upgrade guide: Remove duplicate "may"

Closes #199

Author: ncardeli

pages/upgrade-guide/3.0.md

@@ -372,7 +372,7 @@ https://github.com/jquery/jquery/issues/2710
 ### Dimensions
 #### Breaking change: .width(), .height(), .css("width"), and .css("height") can return non-integer values
 
-Before version 3.0, jQuery used the DOM `offsetWidth` and `offsetHeight` properties to determine the dimensions of an element, and these properties always return integers. With jQuery 3.0 we get more precise values via the DOM `getBoundingClientRect` API, and these may may not be integers. If your code always expects integers for dimensions, it may need to be adjusted to deal with this extra precision.
+Before version 3.0, jQuery used the DOM `offsetWidth` and `offsetHeight` properties to determine the dimensions of an element, and these properties always return integers. With jQuery 3.0 we get more precise values via the DOM `getBoundingClientRect` API, and these may not be integers. If your code always expects integers for dimensions, it may need to be adjusted to deal with this extra precision.
 
 https://github.com/jquery/jquery/issues/1724