Allow inline expressions to span multiple lines

Author: cdce8p

language/syntaxes/expressions.tmGrammar.json

@@ -3,7 +3,7 @@
   "injectionSelector": "L:source.github-actions-workflow",
   "patterns": [
     {
-      "include": "#inline-expression"
+      "include": "#block-inline-expression"
     },
     {
       "include": "#block-if-expression"
@@ -13,18 +13,15 @@
     }
   ],
   "repository": {
-    "inline-expression": {
-      "match": "[|-]?\\$\\{\\{(.*?)\\}\\}",
+    "block-inline-expression": {
       "name": "meta.embedded.block.github-actions-expression",
-      "captures": {
-        "1": {
-          "patterns": [
-            {
-              "include": "#expression"
-            }
-          ]
+      "begin": "[|-]?\\$\\{\\{",
+      "end": "\\}\\}",
+      "patterns": [
+        {
+          "include": "#expression"
         }
-      }
+      ]
     },
     "block-if-expression": {
       "contentName": "meta.embedded.block.github-actions-expression",