Add --strict flag to sha256sum commands for macOS compatibility

Author: slachiewicz

maven-wrapper-distribution/src/resources/mvnw

@@ -230,7 +230,7 @@ if [ -n "${distributionSha256Sum-}" ]; then
     echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
     exit 1
   elif command -v sha256sum >/dev/null; then
-    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c - >/dev/null 2>&1; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum --strict -c - >/dev/null 2>&1; then
       distributionSha256Result=true
     fi
   elif command -v shasum >/dev/null; then