Ping on this?

References:
 <http://lists.gnu.org/archive/html/automake-patches/2011-01/msg00032.html>
 <http://debbugs.gnu.org/cgi/bugreport.cgi?bug=7647>

I've rebased the patch on latest maint, and improved the comments in the
testcase `primary-prefix-documented-valid.test'.  Below is what I've
squashed in; the updated patch is attached.

So... OK for maint?

Regards,
  Stefano

-*-*-*-

diff --git a/ChangeLog b/ChangeLog
index 625d580..5e1dcd2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,4 @@
-2011-01-03  Stefano Lattarini  <stefano.lattarini@gmail.com>
+2011-01-27  Stefano Lattarini  <stefano.lattarini@gmail.com>
 
        Warnings about primary/prefix mismatch fixed and extended.
        * automake.in (%standard_prefix): Add `doc' and `locale'.
diff --git a/tests/primary-prefix-invalid-couples.test b/tests/primary-prefix-invalid-couples.test
index bd7a346..a8f61a9 100755
--- a/tests/primary-prefix-invalid-couples.test
+++ b/tests/primary-prefix-invalid-couples.test
@@ -103,11 +103,12 @@ for primary in $primaries; do
     TEXINFOS)
       # FIXME: Here we'd like to have:
       #   prefixes_ok='info'
-      # but Automake currently fails on that, as it allows the TEXINFOS
-      # primary to be coupled to any prefix.
+      # but Automake currently fails on that, as it allows the use of
+      # `foo_TEXINFOS' to declare extra Texinfo sources for the `foo'
+      # Texinfo manual, as in e.g.:
+      #   info_TEXINFOS = foo.texi
+      #   foo_TEXINFOS = gpl.texi
       # See also Automake bug#7657.
-      # We should dig out how automake had come to behave this way, and
-      # if such a behaviour can be safely changed.
       prefixes_ok=$prefixes
       ;;
     *)