Can't "Command+A" to select the code

[junezhang]

For example, in this page, https://v2-patternfly.rhcloud.com/pattern-library/cards/trend-card/#/_code
The code below index.html.

When mouseover the code area, Command +A, it can't select all the code below index.html. If it feels confusion to operate Command+A to select the code, you can add a little button "Copy" to let user copy the code easier than now. Currently we need to manually select the code.

My environment is Mac 10.10.5, and Chrome 50.0.2661.102 (64-bit).

[junezhang]

I found the little "Copy" button for HTML/CSS, if angularjs part, will be "Edit in Plunkr"
make sense to me.