Latexdiff is a simple latex program which helps in finding out differences in different versions of same latex documents. This feature is exactly same as the one available with MS words.
Please follow the instructions to install the package Latexdiff. Once installed with correct path information, following command will give you an out put tex file with the difference between two compared versions of same latex document.
latexdiff skt_version_1.tex skt_version_2.tex >diff.tex
diff.tex is the output file which, if compiled with latex compiler, will tell one the difference between both the versions.
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