[PATCH 16/32] man/curs_addchstr.3x: Revise.

[G. Branden Robinson]

Content:
* Fix misnamed parameter in "RETURN VALUE" section (`wchstr` ->
  `chstr`).
* Stop saying that output is written to the "current cursor position".
  That is always the case in curses, and stated in subsection "Overview"
  of ncurses.3x.

Style:
* Describe the "core" functions, `waddstr` and `waddnstr` first.  The
  variants ring the usual changes.
* Parallelize wording with other recently updated ncurses man pages.
* Favor active voice over passive.
* Recast.

Markup:
* Favor man(7) font style macros over *roff font selection escape
  sequences, except for man page cross references (because
  man/make_sed.sh recognizes only certain patterns when rewriting such
  cross references) and terms in the "NAME" section (because the
  generated edit_man.sh script expects font selection escape sequences
  when scraping terms from there to gather names for man page aliases).
---
 man/curs_addchstr.3x | 77 ++++++++++++++++++++++++++++++--------------
 1 file changed, 52 insertions(+), 25 deletions(-)

diff --git a/man/curs_addchstr.3x b/man/curs_addchstr.3x
index 25d322aff..6c78ddcb2 100644
--- a/man/curs_addchstr.3x
+++ b/man/curs_addchstr.3x
@@ -69,39 +69,63 @@ .SH SYNOPSIS
 \fBint mvwaddchnstr(WINDOW *\fIwin\fP, int \fIy\fP, int \fIx\fP, const chtype 
*\fIchstr\fP, int \fIn\fP);
 .fi
 .SH DESCRIPTION
-These functions copy the (null-terminated)
-\fIchstr\fP array
-into the window image structure
-starting at the current cursor position.
+.B \%waddchstr
+copies the string of
+.I curses
+characters
+.I \%chstr
+to the window
+.IR win "."
+A null
+.I curses
+character terminates the string.
+.B \%waddchnstr
+does the same,
+but copies at most
+.I n
+characters,
+or as many as possible if
+.I n
+is
+.BR \-1 "."
+\fB\%ncurses\fP(3X) describes the variants of these functions.
 .PP
-The four functions with \fIn\fP as the last
-argument copy at most \fIn\fP elements,
-but no more than will fit on the line.
-If \fBn\fP=\fB\-1\fP then the whole array is copied,
-to the maximum number of characters that will fit on the line.
-.PP
-The window cursor is \fInot\fP advanced.
-These functions are faster than \fBwaddnstr\fP.
-On the other hand:
+Because these functions do not call \fB\%waddch\fP(3X) internally,
+they are faster than \fB\%waddstr\fP(3X) and \fB\%waddnstr\fP(3X).
+On the other hand,
+they
 .bP
-they do not perform checking
-(such as for the newline, backspace, or carriage return characters),
+do not treat the backspace,
+carriage return,
+or line feed characters specially;
 .bP
-they do not advance the current cursor position,
+do not represent unprintable characters with \fB\%unctrl\fP(3X);
 .bP
-they do not expand other control characters to ^-escapes, and
+do not update the cursor position to follow the last character written;
 .bP
-they truncate the string if it crosses the right margin,
-rather than wrapping it around to the new line.
+truncate the string at the window's right margin,
+rather than wrapping it to the next line and potentially scrolling.
 .SH RETURN VALUE
-All functions return the integer \fBERR\fP upon failure and \fBOK\fP on 
success.
+These functions return
+.B OK
+on success and
+.B ERR
+on failure.
 .PP
 X/Open Curses does not specify any error conditions.
-This implementation returns an error
+.I \%ncurses
+returns
+.B ERR
+if
 .bP
-if the \fIwin\fP parameter is null or
+.I win
+is
+.B NULL
+or
 .bP
-if the \fIwchstr\fP parameter is null.
+.I chstr
+is
+.BR NULL "."
 .PP
 Functions prefixed with \*(``mv\*('' first perform cursor movement and
 fail if the position
@@ -109,9 +133,12 @@ .SH RETURN VALUE
 .IR x )
 is outside the window boundaries.
 .SH NOTES
-All functions except \fBwaddchnstr\fP may be macros.
+All of these functions except
+.B \%waddchnstr
+may be implemented as macros.
 .SH PORTABILITY
-These functions are described in X/Open Curses, Issue 4.
+X/Open Curses,
+Issue 4 describes these functions.
 .SH SEE ALSO
 \fB\%curs_add_wchstr\fP(3X) describes comparable functions of the
 .I \%ncurses
-- 
2.30.2

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