Content:
* Explicitly note that `winstr()` does not count the null terminator
  writes to the target string in the count of copied characters it uses
  as its return value.

Style:
* Parallelize wording with other recently edited ncurses man pages.
---
 man/curs_instr.3x | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/man/curs_instr.3x b/man/curs_instr.3x
index d7dc67115..2d6ede0dd 100644
--- a/man/curs_instr.3x
+++ b/man/curs_instr.3x
@@ -101,16 +101,15 @@ .SH RETURN VALUE
 These functions return the count of characters copied from
 .I win
 to
-.IR str ","
+.I str
+(not counting the null terminator),
 or
 .B ERR
 upon failure.
 .PP
 In
 .IR \%ncurses ","
-these functions return
-.B ERR
-if
+these functions fail if
 .bP
 the
 .I curses
-- 
2.30.2

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