Merge branch 'tl/notes-separator'

'git notes append' was taught '--separator' to specify string to insert between paragraphs. * tl/notes-separator: notes: introduce "--no-separator" option notes.c: introduce "--[no-]stripspace" option notes.c: append separator instead of insert by pos notes.c: introduce '--separator=<paragraph-break>' option t3321: add test cases about the notes stripspace behavior notes.c: use designated initializers for clarity notes.c: cleanup 'strbuf_grow' call in 'append_edit'