test: add case for multiline template literals

Author: som-sm

test/prefer-string-raw.js

@@ -79,6 +79,15 @@ test.snapshot({
 		'a = {[`a\\\\b${foo}cd${foo.bar}e\\\\f`]: b}',
 		'a = `a${foo}${foo.bar}b\\\\c`',
 		'a = `a\\\\b${"c\\\\d"}e`',
+		outdent`
+			a = \`\\\\a
+			b\`
+		`,
+		outdent`
+			a = \`\\\\a\${foo}
+			b\${bar}c
+			d\\\\\\\\e\`
+		`,
 	],
 });
 

test/snapshots/prefer-string-raw.js.md

@@ -241,3 +241,57 @@ Generated by [AVA](https://avajs.dev).
     > 1 | a = \`a\\\\b${"c\\\\d"}e\`␊
         |            ^^^^^^ \`String.raw\` should be used to avoid escaping \`\\\`.␊
     `
+
+## invalid(6): a = `\\a b`
+
+> Input
+
+    `␊
+      1 | a = \`\\\\a␊
+      2 | b\`␊
+    `
+
+> Output
+
+    `␊
+      1 | a = String.raw\`\\a␊
+      2 | b\`␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | a = \`\\\\a␊
+        |     ^^^^␊
+    > 2 | b\`␊
+        | ^^^ \`String.raw\` should be used to avoid escaping \`\\\`.␊
+    `
+
+## invalid(7): a = `\\a${foo} b${bar}c d\\\\e`
+
+> Input
+
+    `␊
+      1 | a = \`\\\\a${foo}␊
+      2 | b${bar}c␊
+      3 | d\\\\\\\\e\`␊
+    `
+
+> Output
+
+    `␊
+      1 | a = String.raw\`\\a${foo}␊
+      2 | b${bar}c␊
+      3 | d\\\\e\`␊
+    `
+
+> Error 1/1
+
+    `␊
+    > 1 | a = \`\\\\a${foo}␊
+        |     ^^^^^^^^^^␊
+    > 2 | b${bar}c␊
+        | ^^^^^^^^␊
+    > 3 | d\\\\\\\\e\`␊
+        | ^^^^^^^^ \`String.raw\` should be used to avoid escaping \`\\\`.␊
+    `