However, git master has several commits porting away from it to QTextBrowser:
This project is discontinued upstream. It has been forked into the Oscar project.
See this bug report for more details: https://bugs.gentoo.org/696058
Oscar has patches to remove dependencies on the web viewer, which is typically used for displaying help/documentation.
Per Brian's comment this package should probably just be treecleaned in favor of its replacement. I'll go ahead and remove it...
The bug has been referenced in the following commit(s):
Author: Richard Freeman <email@example.com>
AuthorDate: 2020-02-16 20:59:35 +0000
Commit: Richard Freeman <firstname.lastname@example.org>
CommitDate: 2020-02-16 20:59:35 +0000
package.mask: mask app-misc/sleepyhead for removal
Signed-off-by: Richard Freeman <email@example.com>
profiles/package.mask | 4 ++++
1 file changed, 4 insertions(+)
sleepyhead has been removed from the tree - upstream is dead and has been replaced by oscar (not yet in the repo).