Handle new line in variable initializer when expression ends with arrow operator

Fixes #702

Author: sheetalkamat

TypeScript.YAML-tmLanguage

@@ -631,7 +631,7 @@ repository:
   variable-initializer:
     patterns:
     # if it is assignment with expression on same line, use end of line as end of scope
-    - begin: (?<!=|!)(=)(?!=)(?=\s*\S)
+    - begin: (?<!=|!)(=)(?!=)(?=\s*\S)(?!\s*.*=>\s*$)
       beginCaptures:
         '1': { name: keyword.operator.assignment.ts }
       end: (?=$|^|[,);}\]]|(\s+(of|in)\s+))

TypeScript.tmLanguage

@@ -1994,7 +1994,7 @@
         <array>
           <dict>
             <key>begin</key>
-            <string>(?&lt;!=|!)(=)(?!=)(?=\s*\S)</string>
+            <string>(?&lt;!=|!)(=)(?!=)(?=\s*\S)(?!\s*.*=&gt;\s*$)</string>
             <key>beginCaptures</key>
             <dict>
               <key>1</key>

TypeScriptReact.tmLanguage

@@ -1998,7 +1998,7 @@
         <array>
           <dict>
             <key>begin</key>
-            <string>(?&lt;!=|!)(=)(?!=)(?=\s*\S)</string>
+            <string>(?&lt;!=|!)(=)(?!=)(?=\s*\S)(?!\s*.*=&gt;\s*$)</string>
             <key>beginCaptures</key>
             <dict>
               <key>1</key>

tests/baselines/Issue702.baseline.txt

@@ -0,0 +1,36 @@
+original file
+-----------------------------------
+const t = () =>
+`a`
+-----------------------------------
+
+Grammar: TypeScript.tmLanguage
+-----------------------------------
+>const t = () =>
+ ^^^^^
+ source.ts meta.var.expr.ts storage.type.ts
+      ^
+      source.ts meta.var.expr.ts
+       ^
+       source.ts meta.var.expr.ts meta.var-single-variable.expr.ts meta.definition.variable.ts variable.other.constant.ts entity.name.function.ts
+        ^
+        source.ts meta.var.expr.ts meta.var-single-variable.expr.ts
+         ^
+         source.ts meta.var.expr.ts keyword.operator.assignment.ts
+          ^
+          source.ts meta.var.expr.ts meta.arrow.ts
+           ^
+           source.ts meta.var.expr.ts meta.arrow.ts meta.parameters.ts punctuation.definition.parameters.begin.ts
+            ^
+            source.ts meta.var.expr.ts meta.arrow.ts meta.parameters.ts punctuation.definition.parameters.end.ts
+             ^
+             source.ts meta.var.expr.ts meta.arrow.ts
+              ^^
+              source.ts meta.var.expr.ts meta.arrow.ts storage.type.function.arrow.ts
+>`a`
+ ^
+ source.ts meta.var.expr.ts string.template.ts punctuation.definition.string.template.begin.ts
+  ^
+  source.ts meta.var.expr.ts string.template.ts
+   ^
+   source.ts meta.var.expr.ts string.template.ts punctuation.definition.string.template.end.ts

tests/cases/Issue702.ts

@@ -0,0 +1,2 @@
+const t = () =>
+`a`