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+Usage:
+  v fmt [options] path_to_source.v [path_to_other_source.v]
+  v fmt [options] path/to/dir [path/to/other_dir]
+  cat source.v | v fmt
+        Read source code from stdin, output formatted file to stdout.
+
+Formats the given V source files or recursively formats all files in the directory,
+then prints their formatted source to stdout.
+
+Options:
+  -c      Check if a file is already formatted. If not, print the filepath and exit with code 2.
+          Compared to -verify it is quicker but has a small trade-off in precision.
+
+  -diff   Display the differences between the formatted source(s) and the original source(s).
+          This will attempt to find a working `diff` command automatically unless you
+          specify one with the VDIFF_TOOL environment variable.
+
+  -l      List files whose formatting differs from vfmt.
+
+  -w      Write result to (source) file(s) instead of to stdout.
+
+  -debug  Print the kinds of encountered AST statements/expressions on stderr.
+
+  -verify Make sure the provided file is already formatted. Useful for checking code contributions
+          in CI for example.
+
+Environment Variables:
+  VDIFF_TOOL      A command-line tool that will be executed with the original file path
+                  and a temporary formatted file path as arguments. e.g.
+                  `VDIFF_TOOL=opendiff v fmt -diff path/to/file.v` will become:
+                  opendiff path/to/file.v /tmp/v/vfmt_file.v
+
+  VDIFF_OPTIONS   A set of command-line options to be sent immediately after the
+                  `diff` command. e.g.
+                  VDIFF_OPTIONS="-W 80 -y" v fmt -diff path/to/file.v /tmp/v/vfmt_file.v