Add skip_whitespace parameter to replace_chars_prob.

crates/rand/src/global/string.rs

@@ -18,17 +18,19 @@ pub fn replace_chars_prob(
 	input: String,
 	replacement: String,
 	prob: f32,
+	skip_whitespace: Option<bool>,
 	secure: Option<bool>,
 ) -> String {
 	if !prob.is_normal() || !prob.is_sign_positive() {
 		return input;
 	}
+	let skip_whitespace = skip_whitespace.unwrap_or(false);
 	let mut rng = global(secure);
 	let distro =
 		Bernoulli::new((prob as f64 / 100.0).clamp(0.0, 1.0)).expect("invalid probability, wtf???");
 	let mut output = String::with_capacity(input.len() * replacement.len()); // Allocate for worst case scenario.
 	input.chars().for_each(|c| {
-		if distro.sample(&mut rng) {
+		if (!skip_whitespace || !c.is_whitespace()) && distro.sample(&mut rng) {
 			output.push_str(&replacement);
 		} else {
 			output.push(c);

crates/rand/src/instance/string.rs

@@ -21,16 +21,18 @@ pub fn instnaced_replace_chars_prob(
 	input: String,
 	replacement: String,
 	prob: f32,
+	skip_whitespace: Option<bool>,
 ) -> Option<String> {
 	if !prob.is_normal() || !prob.is_sign_positive() {
 		return Some(input);
 	}
+	let skip_whitespace = skip_whitespace.unwrap_or(false);
 	INSTANCES.lock().get_mut(src).map(|rng| {
 		let distro = Bernoulli::new((prob as f64 / 100.0).clamp(0.0, 1.0))
 			.expect("invalid probability, wtf???");
 		let mut output = String::with_capacity(input.len() * replacement.len()); // Allocate for worst case scenario.
 		input.chars().for_each(|c| {
-			if distro.sample(rng) {
+			if (!skip_whitespace || !c.is_whitespace()) && distro.sample(rng) {
 				output.push_str(&replacement);
 			} else {
 				output.push(c);