sources.list handling: match "sid" and "unstable" only as whole words.

When we grep for "sid" this matches the string "consider", so make
sure we consider "sid" (and "unstable" while at it as well) only
if it's being used as a whole word.

Thanks to Andreas Korsten for reporting.

diff --git a/grml-live b/grml-live
index 0c27ce1..95e3dab 100755 (executable)
--- a/grml-live
+++ b/grml-live
@@ -439,7 +439,7 @@ for file in "$LIVE_CONF" "$CONFIG" "$LOCAL_CONFIG" ; do
 done
 
 # notice: activate grml-live pool only if we are building against unstable:
-if grep -qe unstable -qe sid "$SOURCES_LIST_FILE" ; then
+if grep -qwe unstable -qwe sid "$SOURCES_LIST_FILE" ; then
    grep -q 'grml-live.*main' "$SOURCES_LIST_FILE" || \
    grep grml-stable "$SOURCES_LIST_FILE" | \
         sed 's/grml-stable/grml-live/' >> "$SOURCES_LIST_FILE"