GitLab

* doc/misc/ert.texi (Running Tests Interactively): Correct
Elisp manual titile in xref.
* doc/lispref/edebug.texi (Edebug Misc): Use single argument
form of xref.
* doc/lispref/debugging.texi (Backtraces): Add comma and
period after xref braces.
(Backtraces): Correct Emacs manual title.
(Internals of Debugger): Add a space before period.