Fix panic for Ruby files with unindented heredocs

CHANGELOG.md

@@ -13,6 +13,7 @@
 
 - Performance problems with C# source code have been fixed, see #677 (@keith-hall)
 - Performance problems with Makefiles have been fixed, see #750 (@keith-hall)
+- Fig bux when highlighting Ruby files with unindented heredocs, see #914 (@keith-hall)
 
 ## Other
 

tests/examples/regression_tests/issue_190.md

@@ -0,0 +1,3 @@
+```javascript
+var test = "boom";
+```

tests/examples/regression_tests/issue_28.md

@@ -0,0 +1,4 @@
+Test
+
+<div>
+</div>

tests/examples/regression_tests/issue_314.hs

@@ -0,0 +1,4 @@
+module Main where
+
+main :: IO ()
+main = putStrLn "Please show my file :c"

tests/examples/regression_tests/issue_914.rb

@@ -0,0 +1,3 @@
+<<END_DESC
+Test
+END_DESC

tests/examples/regression_tests/issue_915.vue

@@ -0,0 +1,2 @@
+<style lang="stylus">
+</style>

tests/integration_tests.rs

@@ -627,3 +627,20 @@ fn filename_multiple_err() {
         .assert()
         .failure();
 }
+
+#[test]
+fn do_not_panic_regression_tests() {
+    for filename in &[
+        "issue_28.md",
+        "issue_190.md",
+        "issue_314.hs",
+        "issue_914.rb",
+        "issue_915.vue",
+    ] {
+        bat()
+            .arg("--color=always")
+            .arg(&format!("regression_tests/{}", filename))
+            .assert()
+            .success();
+    }
+}