Remove trailing whitespace from all text files

I've used the following command to remove the trailing whitespace for
all tracked text files:

git grep -Il '' | xargs sed -i 's/[ \t]*$//'

bin/tests/system/doth/CA/certs/srv01.client01.example.com.pem

@@ -22,7 +22,7 @@ Certificate:
                 ASN1 OID: secp384r1
                 NIST CURVE: P-384
         X509v3 extensions:
-            X509v3 Subject Alternative Name: 
+            X509v3 Subject Alternative Name:
                 DNS:srv01.client01.example.com
     Signature Algorithm: sha256WithRSAEncryption
          82:bd:eb:8f:4e:a5:d2:46:c7:d8:70:3c:34:1d:58:43:1b:81: