Standardise home page or homepage

[tunetheweb]

We use both (171 instances with space, 117 without).

The Methodology uses "home page"

We use the Google Style Guide and it's word list isn't clear (I've raised a bug to ask):

• It notes "home screen" (for Android) should be two words
• "Web page" should be two words.
• "Website" should be one word.

It also references these which all say two words:

• Chicago Manual of style
• Merriam Webster
• MS Style guide

However, others use "homepage" - see list here: https://english.stackexchange.com/a/112057

For not I'm going to say it's two words as I think it particularly looks odd when presented alongside "inner pages":

Will add to the editor's guide and leave this issue open until I fix them all.