Auto merge of #1179 - kpfefferle:toc-hover-wrapping, r=acorncom
Auto merge of #1179 - kpfefferle:toc-hover-wrapping, r=acorncom

Prevent text wrapping on TOC hover animation

Resolves #1174

Old behavior:
![old](https://cloud.githubusercontent.com/assets/250934/12441153/1332bc4a-bf12-11e5-937b-5253f3d7b023.gif)

New behavior:
![new](https://cloud.githubusercontent.com/assets/250934/12441158/1aa9e5a2-bf12-11e5-84bf-43c68ae0f86b.gif)

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