notcurses_output: properly escape tab and newline

doc/man/man3/notcurses_output.3.md

@@ -101,7 +101,7 @@ Functions accepting a set of EGCs must consist of a series of well-formed EGCs,
 broken by cluster breaks, terminated by the appropriate NUL terminator.
 
 Control characters are rejected, aside from two exceptions: a horizontal tab
-(**'\t'**, 0x09), and a newline (**'\n'**, 0x0a) *when the output plane
+(**'\\t'**, 0x09), and a newline (**'\\n'**, 0x0a) *when the output plane
 is in scrolling mode*. A newline outside of scrolling mode will be rejected.
 A tab will advance to the next tab stop, filling the space between with spaces.
 Tab stops are separated by eight columns, and the first character of each line