Fix the broken script in AssertFingerprintOrThumbprint.

Bug: 62252466
Test: Re-generate an incremental OTA that goes from the fingerprint to
      thumbprint, and check the updater-script.
Change-Id: I6e2cbf68cbd22fbcf0d200fc3fdc8a33da510a53
(cherry picked from commit d2d01e519e9fb3b1c4c1f021c72385eaa0b4b9ae)
diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index 8125bb6..73131a6 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -130,7 +130,7 @@
            '    getprop("ro.build.thumbprint") == "{tp}" ||\n'
            '    abort("Package expects build fingerprint of {fp} or '
            'thumbprint of {tp}; this device has a fingerprint of " '
-           '+ getprop("ro.build.fingerprint") and a thumbprint of " '
+           '+ getprop("ro.build.fingerprint") + " and a thumbprint of " '
            '+ getprop("ro.build.thumbprint") + ".");').format(fp=fp, tp=tp)
     self.script.append(cmd)