7167976: Fix broken get_source.sh script

Reviewed-by: tbell

make/scripts/hgforest.sh

@@ -59,8 +59,8 @@ if [ "${command}" = "clone" -o "${command}" = "fclone" ] ; then
   done
   if [ "${pull_extra_base}" != "" ] ; then
     subrepos_extra="jdk/src/closed jdk/make/closed jdk/test/closed hotspot/src/closed hotspot/test/closed deploy install sponsors pubs"
-    pull_default_base=`echo ${pull_default} | sed -e 's@\(^.*://[^/]*\)/.*@\1@'`
-    pull_extra=`echo ${pull_default} | sed -e "s@${pull_default_base}@${pull_extra_base}@"`
+    pull_default_tail=`echo ${pull_default} | sed -e 's@^.*://[^/]*/\(.*\)@\1@'`
+    pull_extra="${pull_extra_base}/${pull_default_tail}"
     for i in ${subrepos_extra} ; do
       if [ ! -f ${i}/.hg/hgrc ] ; then
         repos_extra="${repos_extra} ${i}"