Tried google and found similar, but not the exact issue I'm seeing.
I'm running Windows 7 and trying to run a simple bash one-liner using
grep:

[vmorales@D630-Vmorales ~]# uname -a
CYGWIN_NT-6.1-WOW64 D630-Vmorales 1.7.17(0.262/5/3) 2012-10-19 14:39 i686 Cygwin


I'm essentially trying to take the contents of one file, and use it as
input for a grep command against another file, but I do not get any
results, even though I know the 2nd file contains a match.  In the
one-liner below, I include an "echo" to confirm the output is in the
variable that should be used with the grep command.

[vmorales@D630-Vmorales ~]# for i in `cat file-a.txt`; do echo $i;
grep $i file-b.txt; done
alpha
beta
charlie
delta
echo

[vmorales@D630-Vmorales ~]# grep charlie file-b.txt
charlie,13


This is pretty straight-forward and can't think of what I may be
missing here.  Any suggestions would be appreciated.

Vlad