diff --git a/crates/compiler/fmt/src/expr.rs b/crates/compiler/fmt/src/expr.rs
index ac97d812aa..04a23a06be 100644
--- a/crates/compiler/fmt/src/expr.rs
+++ b/crates/compiler/fmt/src/expr.rs
@@ -484,24 +484,20 @@ pub fn fmt_str_literal<'buf>(buf: &mut Buf<'buf>, literal: StrLiteral, indent: u
     buf.push('"');
     match literal {
         PlainLine(string) => {
-            // When a PlainLine contains "\n" it is formatted as a block string using """
-            let mut lines = string.split('\n');
-            match (lines.next(), lines.next()) {
-                (Some(first), Some(second)) => {
-                    buf.push_str("\"\"");
-                    buf.newline();
-
-                    for line in [first, second].into_iter().chain(lines) {
-                        buf.indent(indent);
-                        buf.push_str_allow_spaces(line);
-                        buf.newline();
-                    }
-
+            // When a PlainLine contains '\n' or '"', format as a block string
+            if string.contains('"') || string.contains('\n') {
+                buf.push_str("\"\"");
+                buf.newline();
+                for line in string.split('\n') {
                     buf.indent(indent);
-                    buf.push_str("\"\"");
+                    buf.push_str_allow_spaces(line);
+                    buf.newline();
                 }
-                _ => buf.push_str_allow_spaces(string),
-            }
+                buf.indent(indent);
+                buf.push_str("\"\"");
+            } else {
+                buf.push_str_allow_spaces(string);
+            };
         }
         Line(segments) => {
             for seg in segments.iter() {