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10.2 #compiler

The template:

      // Not a comment
      #compiler commentStartToken = '//'
      // A comment
      #compiler reset
      // Not a comment

The output:

      // Not a comment
      // Not a comment

The generated code:

      write('// Not a comment\n')
      #  A comment
      write('// Not a comment\n')

So this didn't affect the generated program, it just affected how the template definition was read.