implement inlining for template text nodes

packages/svelte/src/compiler/phases/3-transform/client/visitors/template.js

@@ -1558,8 +1558,6 @@ function process_children(nodes, parent, { visit, state }) {
 			return;
 		}
 
-		push_template_quasi(state, ' ');
-
 		const text_id = get_node_id(expression, state, 'text');
 		const contains_call_expression = sequence.some(
 			(n) => n.type === 'ExpressionTag' && n.metadata.contains_call_expression
@@ -1575,21 +1573,19 @@ function process_children(nodes, parent, { visit, state }) {
 		);
 
 		if (contains_call_expression && !within_bound_contenteditable) {
+			push_template_quasi(state, ' ');
 			state.update_effects.push(singular);
 		} else if (
 			sequence.some((node) => node.type === 'ExpressionTag' && node.metadata.dynamic) &&
 			!within_bound_contenteditable
 		) {
+			push_template_quasi(state, ' ');
 			state.update.push({
 				singular,
 				grouped: b.stmt(b.call('$.text', text_id, assignment))
 			});
 		} else {
-			// TODO: uncomment this
+			const { can_inline } = can_inline_all_nodes(sequence, state);
-			// it causes a test to fail. need to understand if it's a valid test or if it should be adjusted or deleted
-			// see https://github.com/sveltejs/svelte/issues/6832 for more context on that test
-			// const { can_inline } = can_inline_all_nodes(sequence, state);
-			const can_inline = false;
 			if (can_inline) {
 				for (let i = 0; i < assignment.quasis.length; i++) {
 					push_template_quasi(state, assignment.quasis[i].value.raw);
@@ -1598,6 +1594,7 @@ function process_children(nodes, parent, { visit, state }) {
 					}
 				}
 			} else {
+				push_template_quasi(state, ' ');
 				state.init.push(init);
 			}
 		}

packages/svelte/tests/hydration/samples/html-tag-hydration/_after.html

@@ -1 +1 @@
-1 2 3
+ 1 2 3

packages/svelte/tests/runtime-legacy/samples/nbsp-div/_config.js

@@ -7,13 +7,8 @@ export default test({
 
 	test({ assert, target }) {
 		const div_list = target.querySelectorAll('div');
-		assert.equal(normalizeSpaces(div_list[0].textContent), ' hello');
+		assert.equal(div_list[0].textContent, ' hello');
-		assert.equal(normalizeSpaces(div_list[1].textContent), ' hello  ');
+		assert.equal(div_list[1].textContent, ' hello  ');
-		assert.equal(normalizeSpaces(div_list[2].textContent), ' hello   hello');
+		assert.equal(div_list[2].textContent, ' hello   hello');
 	}
 });
-
-/** @param {string | null} str */
-function normalizeSpaces(str) {
-	return str ? str.replaceAll(String.fromCharCode(160), ' ') : str;
-}

packages/svelte/tests/snapshot/samples/hoist-unmodified-var/_expected/client/index.svelte.js

@@ -8,7 +8,7 @@ const d = 'd';
 import * as $ from "svelte/internal";
 
 const boolean = false;
-var frag = $.template(`<p autocapitalize="${`w${$.stringify(o)}r${$.stringify(d)}s`}" contenteditable="${boolean}"> </p>`);
+var frag = $.template(`<p autocapitalize="${`w${$.stringify(o)}r${$.stringify(d)}s`}" contenteditable="${boolean}">boolean is ${$.stringify(boolean)} and autocapitalize is w${$.stringify(o)}r${$.stringify(d)}s</p>`);
 
 export default function Hoist_unmodified_var($$anchor, $$props) {
 	$.push($$props, true);
@@ -24,7 +24,6 @@ export default function Hoist_unmodified_var($$anchor, $$props) {
 
 	var text = $.child(p);
 
-	text.nodeValue = `boolean is ${$.stringify(boolean)} and autocapitalize is w${$.stringify(o)}r${$.stringify(d)}s`;
 	$.close($$anchor, p);
 	$.pop();
 }