Curly braces expansion not always works as expected.

[Reuti]

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Hash: SHA1

Date: Thu,  5 Oct 2006 00:19:07 +0200 (CEST)

Configuration Information [Automatically generated, do not change]:
Machine: powerpc
OS: darwin8.0
Compiler: gcc
Compilation CFLAGS: -arch i386 -arch ppc -g -Os -pipe -no-cpp-precomp  
- -mdynamic-no-pic -arch i386 -arch ppc -pipe  -DPROGRAM='bash'
- -DCONF_HOSTTYPE='powerpc' -DCONF_OSTYPE='darwin8.0' - 
DCONF_MACHTYPE='powerpc-apple-darwin8.0' -DCONF_VENDOR='apple' - 
DSHELL -DHAVE_C
ONFIG_H -DMACOSX   -I.  -I/SourceCache/bash/bash-44.2/bash -I/ 
SourceCache/bash/bash-44.2/bash/include -I/SourceCache/bash/bash-44.2/
bash/lib -arch i386 -arch ppc -g -Os -pipe -no-cpp-precomp -mdynamic- 
no-pic -arch i386 -arch ppc -pipe
uname output: Darwin defiant.local 8.8.0 Darwin Kernel Version 8.8.0:  
Fri Sep  8 17:18:57 PDT 2006; root:xnu-792.12.6.obj~1/RELEASE_
PPC Power Macintosh powerpc
Machine Type: powerpc-apple-darwin8.0

Bash Version: 2.05b
Patch Level: 0
Release Status: release

Description:
        Curly braces expansion only works with at least one comma  
(,). This also works, if the appears at least once
        inside some apostrophes and has no function.

Repeat-By:
        reuti@defiant:~> bash --version
        GNU bash, version 2.05b.0(1)-release (powerpc-apple-darwin8.0)
        Copyright (C) 2002 Free Software Foundation, Inc.
        reuti@defiant:~> echo {"x x"} # No {} in output expected.
        {x x}
        reuti@defiant:~> echo {"xx"} # No {} in output expected.
        {xx}
        reuti@defiant:~> echo {"xx","yy"} # Works fine.
        xx yy
        reuti@defiant:~> echo {"x,x"} # Add a comma to get it  
working, i.e. remove the {}.
        x,x
        reuti@defiant:~>

        Also this seems to be strange:

        reuti@defiant:~> echo {"klklkl"} {1,2,3} # Only second {}  
works correctly.
        {klklkl} 1 2 3
        reuti@defiant:~> echo {"klklkl"}{1,2,3} # Completely messed up.
        {klklkl}{1,2,3}
        reuti@defiant:~> echo {"kl,klkl"}{1,2,3} # Add a comma to  
get it working
        kl,klkl1 kl,klkl2 kl,klkl3
        reuti@defiant:~>
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