Update README.md

Author: fluentfuture

README.md

@@ -10,9 +10,14 @@ A small Java 8+ utilities library ([javadoc](http://google.github.io/mug/apidocs
 - ✅ [`Substring`](https://github.com/google/mug/wiki/Substring-Explained) – composable substring extraction  
   → `Substring.between("(", ")").from("call(foo)") → "foo"`
 - ✅ [`StringFormat`](https://github.com/google/mug/wiki/StringFormat-Explained) – compile-time-safe bidirectional formatting  
-  → `new StringFormat("/home/{user}/{year}-{month}-{day}").parse(filePath, (user, year, month, day) -> ...)`
-- ✅ [`SafeSql`](./mug-guava/src/main/java/com/google/mu/safesql/README.md) – SQL string interpolation with injection protection  
-  → `SafeSql.of("select id, ``{col}`` from Users where id = {id}", col, id)` (injection impossible!)
+  → ```
+    new StringFormat("/home/{user}/{year}-{month}-{day}")
+        .parse(filePath, (user, year, month, day) -> ...)
+    ```
+- ✅ [`SafeSql`](./mug-guava/src/main/java/com/google/mu/safesql/README.md) – SQL string template (injection impossible!)
+  → ```
+    SafeSql.of("select id, ``{col}`` from Users where id = {id}", col, id)
+    ```
 - ✅ [`DateTimeFormats`](./mug/src/main/java/com/google/mu/time/README.md) – parse datetimes by example  
   → `DateTimeFormatter format = formatOf("2024-03-14 10:00:00.123 America/New_York")`