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>
(cherry picked from commit 2cc520cdeb6782f9370356f1c7a1bb7f78ea1057)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 8297471b3b41e00d19134453ba5721ad3f85877b)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>