Fix sequences with spaces in front causing BLAST to fail.

If the sequence query somehow contains blank spaces in the front, BLAST
program fails, and an exception is raised. Fix that.

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>
Add chevron to indicate the collapsible nature of hits

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>