You can easily test or enable syntax highlighting, vim supports a huge list of programming languages. Well worth the minutes it takes to activate, it also works in putty.
You can try it out, just open a file and insert these commands:
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:filetype plugin on :syntax onProgramming Language: Text
To make it permanent add these lines to vim ~/.vimrc. Tilde (~) is your home directory.
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vim ~/.vimrcProgramming Language: Bash
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filetype plugin on syntax onProgramming Language: Text