Command substituion of 'ls' in bash returns different results

[Günther Prückl]

The bash version 2.03.0(2)-release (i686-pc-cygwin) and ls version ls (GNU 
fileutils) 3.16 on Windows NT 4.0 returns if it is used in this way:
FILES = $(ls)
different results if it is called more than one time in short time 
intervals:
A shell script produces this output

1. Files in 
/cygdrive/t/OeKB/xstp_classes/tce_gui/1.1.5/axioma/gui/exceptions: 
XBeanException.class XBeanException.java XException.class XEx
ception.java vssver.scc
2. Files in 
/cygdrive/t/OeKB/xstp_classes/tce_gui/1.1.5/axioma/gui/exceptions:
3. Files in 
/cygdrive/t/OeKB/xstp_classes/tce_gui/1.1.5/axioma/gui/exceptions: 
XBeanException.class XBeanException.java XException.class XEx
ception.java vssver.scc
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