Avoid semicolon usage in echo.

configure

 #! /bin/sh
-# From configure.in Revision: 1.372 .
+# From configure.in Revision: 1.373 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.53 for python 2.3.
 #
@@ -11750,7 +11750,7 @@ if test "${with_sgi_dl+set}" = set; then
 
 echo "$as_me:$LINENO: result: $withval" >&5
 echo "${ECHO_T}$withval" >&6
-echo --with-sgi-dl is unsupported; see README
+echo --with-sgi-dl is unsupported, see README
 exit 1
 
 cat >>confdefs.h <<\_ACEOF
@@ -11781,7 +11781,7 @@ if test "${with_dl_dld+set}" = set; then
 
 echo "$as_me:$LINENO: result: $withval" >&5
 echo "${ECHO_T}$withval" >&6
-echo --with-dl-dld is unsupported; see README
+echo --with-dl-dld is unsupported, see README
 exit 1
 
 cat >>confdefs.h <<\_ACEOF

configure.in

@@ -1667,7 +1667,7 @@ AC_ARG_WITH(sgi-dl,
             AC_HELP_STRING(--with-sgi-dl=DIRECTORY, IRIX 4 dynamic linking),
 [
 AC_MSG_RESULT($withval)
-echo --with-sgi-dl is unsupported; see README
+echo --with-sgi-dl is unsupported, see README
 exit 1
 AC_DEFINE(WITH_SGI_DL, 1,
   [Define if you want to use SGI (IRIX 4) dynamic linking.
@@ -1689,7 +1689,7 @@ AC_ARG_WITH(dl-dld,
             AC_HELP_STRING(--with-dl-dld=DL_DIR, GNU dynamic linking),
 [
 AC_MSG_RESULT($withval)
-echo --with-dl-dld is unsupported; see README
+echo --with-dl-dld is unsupported, see README
 exit 1
 AC_DEFINE(WITH_DL_DLD, 1, 
   [Define if you want to emulate SGI (IRIX 4) dynamic linking.