[groff] 33/35: groff_char(7): Revise discussion of `\[rn]`.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit bce08bf93c2a922a732d5d1d28f0a57cb0e79ac3
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Mon Feb 21 21:13:30 2022 +1100

    groff_char(7): Revise discussion of `\[rn]`.
    
    groff dis-unifies the AT&T \(rn special character, splitting its
    overline/box-drawing and radical extension functions.  Communicate this.
---
 man/groff_char.7.man | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/man/groff_char.7.man b/man/groff_char.7.man
index ce3b7234..3d731a74 100644
--- a/man/groff_char.7.man
+++ b/man/groff_char.7.man
@@ -1417,8 +1417,16 @@ namely a rule of one-half em.
 .
 .
 .P
+In AT&T
+.IR troff , \" AT&T
 .B \[rs][rn]
-also appears in subsection \[lq]Mathematical symbols\[rq] below.
+also served as a one\~en extension of the square root symbol.
+.
+.I groff
+favors
+.B \[rs][radicalex]
+for this purpose;
+see subsection \[lq]Mathematical symbols\[rq] below.
 .
 .
 .TS
@@ -1583,15 +1591,16 @@ served as the horizontal extension of the radical
 sign,
 .BR \[rs](sr .
 .
-In
+However,
+a contemporary font's radical sign may not ascend to a maximal drawing
+position.
+.
 .IR groff ,
-you can use
+you can instead use
 .B \[rs][radicalex]
-instead of
-.B \[rs][rn]
-for continuation of the radical sign
+to continue of the radical sign
 .BR \[rs][sr] ;
-these have text metrics.
+these special characters are intended for use with regular text fonts.
 .
 .B \[rs][sqrt]
 and