Bug 37593: Removed all instances of 'this this' in the codebase

Bug 37593: Removed all instances of 'this this' in the codebase

To test:
a)  do a grep for 'this this'
    1)  notice that there are five matching files
    2)  notice that all of these instances are in comments, or podfiles
b)  apply this patch
c)  do a grep for 'this this'
    1)  notice now that these instances are gone
d)  apply these changes to schema.koha-community.org
e)  result!

Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>