Another fix to the helper script

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>

clean_patent_problems.sh

@@ -11,7 +11,7 @@ PROBLEMS=(
 )
 
 # Indicate the source (including workaround for rhbz#1926687)
-URL=$(spectool -S -l ./gnuradio.spec | sed -nE '/^\s*Source/ s/Source0:\s+//g;p')
+URL=$(spectool -S -l ./gnuradio.spec | sed -nE '/^\s*Source/ s/Source0:\s+//g p')
 
 # Meta variables
 SOURCE=$(basename $URL)