commit 1bdcd0500865efd3566efd7f951228f69b58e755
Author: Panu Matilainen <pmatilai@redhat.com>
Date:   Wed Feb 19 14:16:38 2014 +0200

    Dont eat newlines on parametrized macro invocations (RhBug:1045723)
    
    - Makes the testcase from commit f082b5baa4dcf9601eeb1e0e520ff06e77dc61c0
      succeed. While the old behavior is non-sensical and most likely entirely
      unintentional, we're changing a very long-standing behavior here (tested
      back to rpm 4.4.x and almost certainly much much older than that) so
      its entirely possible people are actually relying on the old
      behavior. Lets see what breaks...

diff --git a/rpmio/macro.c b/rpmio/macro.c
index e1c2a91..72471a2 100644
--- a/rpmio/macro.c
+++ b/rpmio/macro.c
@@ -764,7 +764,7 @@ grabArgs(MacroBuf mb, const rpmMacroEntry me, const char * se,
 
 exit:
     argvFree(argv);
-    return *lastc ? lastc + 1 : lastc; 
+    return (*lastc == '\0' || *lastc == '\n') ? lastc : lastc + 1;
 }
 
 /**