Use zprint to correct indentation, but not otherwise reformat a file

While a common use of zprint is to completely reformat a file based on its configuration, zprint also has a :style which will simply correct the indentation of a file, and regularize the white space in the file. It will not change the formatting of the file. In particular, it will not add or remove any newlines in the file, so everything stays on the line that it was on during input.

To get this behavior use:

{:style :indent-only}

When using :style :indent-only, zprint will recognize existing hangs, such as this:

(this is
      a
      test)

by recognizing when the third element of a list falls directly under the second element of a list. When it sees this situation, it will hang all of the elments of the list.

So this:

(this is
      a
   test
         this
is
 only
        a
   test)

will come out like this:

(this is
      a
      test
      this
      is
      only
      a
      test)

For many more examples, look here.