Cosmetic: removed one empty space in excess of end of run summary.
Fix MD5 comparison with s3 compatible servers that are not Amazon S3.

Some servers (like fakes3), doesn't add quotes in ETags aroung md5 value.
Ex.:
AWS: <LastModified>2014-06-05T09:45:25.000Z</LastModified><ETag>&quot;fc0f71ccc63dda0efc30239b48bdeccd&quot;</ETag><Size>132947133</Size>
FAKES3: <LastModified>2014-06-05T09:58:35.982060ZZ</LastModified><ETag>fc0f71ccc63dda0efc30239b48bdeccd</ETag><Size>132947133</Size>
(Nota: &quot; <=> " )

Bug in the previous code was always striping and first and last characters whatever they were. Such, in a fakes3 case, dest md5 was truncated and so would never match.
In the same time, this patch normalize the behavior to always strip " and ' chars in all the code dealing with etags.
Small cleanup of code, using "in" instead of "find" for strings when possible.
Fix an error in my previous commit: b5b61abc8eb159f5932b936c7ca47e618615f6a3. (.find() forgotten to be removed)