Type: Text Tweaker leaves byte offsets to range_of

Remove Text Tweaker's own start and end check: range_of already refuses
a bad offset given with an id, and like the other type commands Text
Tweaker now ignores start and end without one. The test's "2" case
gets an id so it still reaches the check, and docs/mcp.md lists
addon.type.textTweaker with the commands that refuse such offsets.

crates/engine/src/cmd/addons/typetools.rs

@@ -89,12 +89,6 @@ fn text_tweaker(s: &mut Session, p: &Value) -> Result<Value> {
     let mut rng = Rng::new(whole_or(p, "seed", 0, C)?);
     let skip = switch_or(p, "skipSpaces", true, C)?;
     let setup = s.doc()?.doc.setup.clone();
-    // A range given as anything but whole bytes is refused, not read as all of the text.
-    for k in ["start", "end"] {
-        if p.get(k).is_some_and(|v| !v.is_null() && v.as_u64().is_none()) {
-            return Err(bad(C, format!("`{k}` must be a whole number of bytes")));
-        }
-    }
     // At a caret, all of the object's text.
     let ranges = type_ranges(s, p, C, |text, _| Some((0, text.len())))?;
     // Each object's changed characters: (byte, its change), worked out before the edit.

crates/engine/src/cmd/addons/typetools/tests.rs

@@ -196,7 +196,7 @@ fn bad_params_are_refused_without_a_change() {
         json!({"ids": [999_999]}),
         json!({"id": id.0, "start": -1}),
         json!({"id": id.0, "start": 1, "end": 1.5}),
-        json!({"end": "2"}),
+        json!({"id": id.0, "end": "2"}),
     ] {
         assert!(s.execute(C, &p).is_err(), "{p}");
         assert_eq!(s.doc().unwrap().doc, before, "{p}");

docs/mcp.md

@@ -1208,8 +1208,8 @@ and `amount` in `color.harmony`; `angle` in `paint.editGradient` and in the `gra
 swatch refuses a `tint` that is not a number with `` stop 0: `tint` must be a number ``.
 
 A byte offset must be a whole number of at least 0. `at` in `text.startList`, and `start` and `end` in
-`text.editRange`, `text.getRange`, `text.setRangeStyle` and the `type.step`, `type.size.*`, `type.resetTracking` and
-`type.resetHorizontalScale` commands given an `id`, refuse a negative or fractional number with
+`text.editRange`, `text.getRange`, `text.setRangeStyle` and the `type.step`, `type.size.*`, `type.resetTracking`,
+`type.resetHorizontalScale` and `addon.type.textTweaker` commands given an `id`, refuse a negative or fractional number with
 `` `at` must be a whole number ``, naming the key, and change nothing. `2.0` is read as `2`, and a null as the key left out.
 
 A step can use an earlier step's result, in `run` as in the `command_batch` tool. A parameter string that is exactly