Wrap the source code at 80 characters.
Tested with:
$ nbdkit null --filter=partition
 nbdkit: error: you must supply the partition parameter on the command
line 
Bugzilla: 
https://bugzilla.redhat.com/show_bug.cgi?id=2172516
Signed-off-by: Laszlo Ersek <lersek(a)redhat.com>
---
 filters/partition/partition.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/filters/partition/partition.c b/filters/partition/partition.c
index b206f48c8670..c29b14bc327c 100644
--- a/filters/partition/partition.c
+++ b/filters/partition/partition.c
@@ -72,7 +72,8 @@ partition_config_complete (nbdkit_next_config_complete *next,
                            nbdkit_backend *nxdata)
 {
   if (partnum == 0) {
-    nbdkit_error ("you must supply the partition parameter on the command
line");
+    nbdkit_error ("you must supply the partition parameter on the command "
+                  "line");
     return -1;
   }