Please address the comments from this code review:

## Individual Comments

### Comment 1
<location> `internal/testing/testiterator.go:115` </location>
<code_context>
 	return func(testbody func(t *testing.T, tc TestCase) bool) {
 		for _, relative := range []bool{false, true} {
 			for _, inplace := range []bool{false, true} {
-				for _, bin := range tests {
</code_context>

<issue_to_address>
**issue (complexity):** Consider refactoring the nested test loops into a flat list of configuration structs and helper functions to simplify control flow and reduce duplication.

```markdown
You can collapse the four‐deep loops into a flat list of “configs” and then drive both your file-tests and dir-tests from that.  That eliminates most of the nesting and duplicates.  For example:

```go
type config struct {
  nameSuffix string
  opts       []snaggle.Option
  flags      []string
}

// build all combinations up front
func makeConfigs() []config {
  var out []config
  for _, relative := range []bool{false, true} {
    for _, inplace := range []bool{false, true} {
      for _, verbose := range []bool{false, true} {
        desc := ""
        flags := []string{}
        opts  := []snaggle.Option{}
        if relative   { desc += "_relative" }
        if inplace    { desc += "_inplace";  flags = append(flags, "--in-place"); opts = append(opts, snaggle.InPlace()) }
        if verbose    { desc += "_verbose";  flags = append(flags, "--verbose"); opts = append(opts, snaggle.Verbose()) }
        if !verbose    { desc += "_silent" }
        out = append(out, config{desc, opts, flags})
      }
    }
  }
  return out
}
```

Now replace your nested loops with:

```go
for _, cfg := range makeConfigs() {
  t.Run(cfg.nameSuffix, func(t *testing.T) {
    runFileTests(t, cfg, tests)
    if !specificTestsRequested {
      runDirTests (t, cfg, defaultTests)
    }
  })
}
```

And push the body of what was in each inner loop into two helpers:

```go
func runFileTests(t *testing.T, cfg config, tests []TestDetails) {
  for _, bin := range tests {
    tc := makeBaseTC(bin.Path, len(bin.Bin.Elf.Dependencies), cfg)
    generateOutput(bin, &tc, strings.Contains(cfg.nameSuffix, "_inplace"))
    maybeRelativize(&tc, strings.Contains(cfg.nameSuffix, "_relative"))
    if !strings.Contains(cfg.nameSuffix, "_verbose") {
      tc.ExpectedStdout = nil
    }
    testbody(t, tc)
  }
}

func runDirTests(t *testing.T, cfg config, defaults []TestDetails) {
  bins := pickBins(defaults, strings.Contains(cfg.nameSuffix, "_recursive"))
  tc := makeBaseTC(TestdataPath("."), 0, cfg)
  for _, bin := range bins {
    generateOutput(bin, &tc, strings.Contains(cfg.nameSuffix, "_inplace"))
  }
  maybeRelativize(&tc, strings.Contains(cfg.nameSuffix, "_relative"))
  if !strings.Contains(cfg.nameSuffix, "_verbose") {
    tc.ExpectedStdout = nil
  }
  testbody(t, tc)
}
```

You’d also factor out helpers like `makeBaseTC(...)`, `maybeRelativize(...)` and `pickBins(...)`.  This preserves exactly the same behavior but flattens the control flow and removes ~50 lines of duplicated plumbing.
</issue_to_address>

Please address the comments from this code review:

## Overall Comments
- The deeply nested loops and repeated test setup in TestCases (internal/testing/testiterator.go) could be refactored into a more concise table-driven structure or helper functions to reduce duplication and improve readability.
- Flag definitions and help text for --verbose/--version are duplicated between main.go, README.md, and benchmarks.md—consider centralizing them or extracting shared templates to ease future updates.