Merge "Handle grep finds no matches." into main

// See the License for the specific language governing permissions and

// limitations under the License.

package {

    // See: http://go/android-license-faq

    // A large-scale-change added 'default_applicable_licenses' to import

        "java-res/vendor.mime.types",

    ],

    //    strip comments            normalize whitepace       drop empty lines           prepend ? to fields that are missing it

    cmd: "awk '{gsub(/#.*$$/,\"\"); $$1=$$1; print;}' $(in) | grep ' '         | awk '{for(i=1;i<=NF;i++) { sub(/^\\??/, \"?\", $$i); }; print}' > $(out)",

    cmd: "awk '{gsub(/#.*$$/,\"\"); $$1=$$1; print;}' $(in) | (grep ' ' || echo -n '') | awk '{for(i=1;i<=NF;i++) { sub(/^\\??/, \"?\", $$i); }; print}' > $(out)",

}