Prevent unnecessary console output

Dockerfile

@@ -58,7 +58,7 @@ RUN \
         sed \
             -u \
             # Handle multiple occurrences of $pattern
-            -e "/$pattern/{ x; s/^x\{$(expr $patternCount - 1)\}$/\0/; t stuck; s/^\(x*\)$/\1x/; x; };" \
+            -e "/$pattern/{ x; s/^x\{$(expr $patternCount - 1)\}$/\0/; x; t stuck; x; s/^\(x*\)$/\1x/; x; };" \
             # Delete output and return to start
             -e "b;" \
             # Branch "stuck": delete output and exit with code 42