No newline at end of file in html files

[3Rafal]

When generating test cases for #950 , I've found out that generated html files don't end with a new line.
This results in git warning: No newline at end of file and is shown as red marker on GitHub:

The issue doesn't occur for other outputs (tex, man).

[Julow]

The problem seems to be located here: https://github.com/ocaml/odoc/blob/master/src/html/html_page.ml#L149
Tyxml's pp function doesn't output a newline so we need to output one in the content function. The same bug occurs for source pages below.
Would you be interested in fixing this ?

[3Rafal]

Sure, I'll try to fix it. :) Thanks for heads up