fix multiline bindings in builder json

.changeset/green-tables-yell.md

@@ -0,0 +1,5 @@
+---
+'@builder.io/mitosis': patch
+---
+
+Fix multi line bindings from Mitosis to Builder

packages/core/src/__tests__/__snapshots__/builder.test.ts.snap

@@ -920,6 +920,12 @@ exports[`Builder > Regenerate custom Hero 1`] = `
           "code": "400",
           "type": "single",
         },
+        "multiBinding": {
+          "code": "{
+  hello: state.message
+}",
+          "type": "single",
+        },
       },
       "children": [],
       "meta": {},
@@ -969,12 +975,18 @@ exports[`Builder > Regenerate custom Hero 2`] = `
         "actions": {},
         "bindings": {
           "component.options.height": "400",
+          "component.options.multiBinding": "return {
+  hello: state.message
+}",
         },
         "children": [],
         "code": {
           "actions": {},
           "bindings": {
             "component.options.height": "400",
+            "component.options.multiBinding": "{
+  hello: state.message
+}",
           },
         },
         "component": {
@@ -1021,6 +1033,12 @@ exports[`Builder > Regenerate custom Hero 3`] = `
           "code": "400",
           "type": "single",
         },
+        "multiBinding": {
+          "code": "{
+  hello: state.message
+}",
+          "type": "single",
+        },
       },
       "children": [],
       "meta": {},

packages/core/src/__tests__/builder.test.ts

@@ -296,6 +296,9 @@ describe('Builder', () => {
             image="https://cdn.builder.io/api/v1/image/assets%2FYJIGb4i01jvw0SRdL5Bt%2F52dcecf48f9c48cc8ddd8f81fec63236"
             buttonLink="https://example.com"
             buttonText="Click"
+            multiBinding={{
+              hello: state.message,
+            }}
             height={400}
             css={{
               display: "flex",

packages/core/src/generators/builder/generator.ts

@@ -481,6 +481,20 @@ export const componentToBuilder =
         if (value) {
           set(el, 'component.options.symbol.content', value);
         }
+        if (el.bindings) {
+          for (const [key, value] of Object.entries(el.bindings)) {
+            if (value.match(/\n|;/)) {
+              if (!el.code) {
+                el.code = {};
+              }
+              if (!el.code.bindings) {
+                el.code.bindings = {};
+              }
+              el.code.bindings[key] = value;
+              el.bindings[key] = `return ${value}`;
+            }
+          }
+        }
       }
     });