update NEWS, SH_RELEASE (re: 970069a6)

NEWS

@@ -3,6 +3,12 @@ For full details, see the git log at: https://github.com/ksh93/ksh
 
 Any uppercase BUG_* names are modernish shell bug IDs.
 
+2020-09-21:
+
+- A bug was fixed that caused command substitutions embedded in here-documents
+  to lose the output of the commands they ran. This bug occurred when ksh was
+  compiled with the SHOPT_SPAWN compile-time option.
+
 2020-09-20:
 
 - Bugfix: when whence -v/-a found an "undefined" (i.e. autoloadable) function

src/cmd/ksh93/include/version.h

@@ -17,4 +17,4 @@
 *                  David Korn <dgk@research.att.com>                   *
 *                                                                      *
 ***********************************************************************/
-#define SH_RELEASE	"93u+m 2020-09-20"
+#define SH_RELEASE	"93u+m 2020-09-21"

src/cmd/ksh93/tests/subshell.sh

@@ -759,7 +759,7 @@ SHELL=$SHELL "$SHELL" -c '
 ' | awk '/^DEBUG/ { pid[NR] = $2; }  END { exit !(pid[1] == pid[2] && pid[2] == pid[3]); }' \
 || err_exit "setting PATH to readonly in subshell triggers an erroneous fork"
 
-# ======'
+# ======
 # Test command substitution with external command in here-document
 # https://github.com/ksh93/ksh/issues/104
 expect=$'/dev/null\n/dev/null'