Make nxml-newline-and-indent argument optional

* lisp/nxml/nxml-mode.el (nxml-newline-and-indent): Make argument
optional to conform to 'comment-line-break-function'.  (Bug#40193)
1 job for master in 69 minutes and 25 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
failed #8329
test-all

01:09:25

 
Name Stage Failure
failed
test-all Test
make[2]: *** [check-doit] Error 1
Makefile:313: recipe for target 'check-doit' failed
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:288: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:966: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1