pqa - pqa: More normalization changes This patch changes display of

Log Message:
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More normalization changes

This patch changes display of normalized results for enhanced readability :
- replacing string is now "{ }"
- it drops quotes around strings

Also it makes normalization work on ruby 1.6 by changing gsub args to regexp for stripping \'.
Tested it on 1.8.1 and 1.6.8.

Modified Files:
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pqa/lib:
pqa.rb (r1.76 -> r1.77)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pqa/pqa/lib/pqa.rb.diff?r1=1.76&r2=1.77)