[PATCH] strftime.3: consistently document fall-back format string

[Eugene Syromyatnikov <evgsyr@gmail.com>]

The information is taken from POSIX[1] and the implementations[2][3][4].

[1] https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_05_03
[2] https://sourceware.org/git/?p=glibc.git;a=blob;f=time/strftime_l.c
[3] https://git.musl-libc.org/cgit/musl/tree/src/locale/langinfo.c#n15
[4] https://git.uclibc.org/uClibc/tree/libc/misc/locale/locale.c#n992

* man3/strftime.3 (%c, %x, %X): Add information about fall-back format.
(%r): Move it behind SU comment.

Signed-off-by: Eugene Syromyatnikov <evgsyr@gmail.com>
---
 man3/strftime.3 | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/man3/strftime.3 b/man3/strftime.3
index 62b77bf..dd7dec7 100644
--- a/man3/strftime.3
+++ b/man3/strftime.3
@@ -107,6 +107,8 @@ The full month name according to the current locale.
 .TP
 .B %c
 The preferred date and time representation for the current locale.
+(In the POSIX locale this is equivalent to
+.BR "%a %b %e %H:%M:%S %Y" .)
 .TP
 .B %C
 The century number (year/100) as a 2-digit integer. (SU)
@@ -240,9 +242,9 @@ string for the current locale.
 .TP
 .B %r
 The time in a.m. or p.m. notation.
-In the POSIX locale this is equivalent to
-.BR "%I:%M:%S %p" .
 (SU)
+(In the POSIX locale this is equivalent to
+.BR "%I:%M:%S %p" .)
 .TP
 .B %R
 The time in 24-hour notation
@@ -324,9 +326,13 @@ and
 .TP
 .B %x
 The preferred date representation for the current locale without the time.
+(In the POSIX locale this is equivalent to
+.BR %m/%d/%y .)
 .TP
 .B %X
 The preferred time representation for the current locale without the date.
+(In the POSIX locale this is equivalent to
+.BR %H:%M:%S .)
 .TP
 .B %y
 The year as a decimal number without a century (range 00 to 99).
-- 
2.1.4