man: minor manual edits
diff --git a/man/man3/ioproc.3 b/man/man3/ioproc.3
index c0fd414..865a988 100644
--- a/man/man3/ioproc.3
+++ b/man/man3/ioproc.3
@@ -154,12 +154,12 @@
}
.EE
.LP
-If the two
+The two
.I relaythread
-instances were running in different procs, the
+instances are running in the same proc, so the
common access to
.I tot
-would be unsafe.
+is safe.
.PP
Implement
.IR ioread :
diff --git a/man/man3/postnote.3 b/man/man3/postnote.3
index 1bf10ee..7c32396 100644
--- a/man/man3/postnote.3
+++ b/man/man3/postnote.3
@@ -26,17 +26,15 @@
is
.BI PNGROUP ,
the note is delivered to the
-process group which has the process with id
-.I pid
-as a member.
+process group containing the process with id
+.IR pid .
For
.B PNGROUP
only, if the calling process is in the target group, the note is
.I not
delivered to that process.
.PP
-If the write is successful, zero is returned.
-Otherwise \-1 is returned.
+Returns zero if the write succeeds, otherwise \-1.
.SH SOURCE
.B \*9/src/lib9/postnote.c
.SH "SEE ALSO"
diff --git a/man/man3/sysfatal.3 b/man/man3/sysfatal.3
index d0a6665..c1e9b83 100644
--- a/man/man3/sysfatal.3
+++ b/man/man3/sysfatal.3
@@ -57,6 +57,8 @@
can be used safely in multi-threaded programs.
.SH SOURCE
.B \*9/src/lib9/sysfatal.c
+.br
+.B \*9/src/lib9/syslog.c
.SH "SEE ALSO"
.IR intro (3),
.IR errstr (3),
