camel_stream_printf() is next on the chopping block.
Use g_strdup_printf() or a GString to construct a formatted string in
memory, pass it to camel_stream_write() in one go, and then check for
errors (unless it's a memory stream).
EMFormatHTML now holds a sealed EWebView instead of a public GtkHTML,
accessible through em_format_html_get_web_view().
Rename e_mail_reader_get_html_display() to e_mail_reader_get_formatter()
and have it return an EMFormatHTML instead of an EMFormatHTMLDisplay,
since that's usually the type you want (or else an EMFormat, but never
an EMFormatHTMLDisplay).
Marks them as "system plugins" so they're not shown in Plugin Manager.
This is a temporary fix until I can rework EMFormat to use GTypeModule
extensions instead of EPlugins.
