fix(prompting): improve language block handling in PromptOptimizer #317

Enhanced the handling of language blocks in `PromptOptimizer` to correctly format text for `txt`, `md`, and `markdown` languages. Added a test case to verify the handling of `devin` language blocks.

Author: phodal

core/src/main/kotlin/cc/unitmesh/devti/prompting/optimizer/PromptOptimizer.kt

@@ -8,8 +8,10 @@ object PromptOptimizer {
         return fences.joinToString("\n") {
             if (it.originLanguage == "python") {
                 "```${it.originLanguage}\n${it.text}\n```"
-            } else {
+            } else if (it.originLanguage == "txt" || it.originLanguage == "md" || it.originLanguage == "markdown") {
                 trim(it.text)
+            } else {
+                "```${it.originLanguage}\n${trim(it.text)}\n```"
             }
         }
     }

core/src/test/kotlin/cc/unitmesh/devti/prompting/optimizer/PromptOptimizerTest.kt

@@ -201,4 +201,38 @@ def foo():
 
         assertThat(result).isEqualTo(expected)
     }
+
+    @Test
+    fun should_handle_with_devin_block() {
+        val content = """
+            |```devin
+            |/write:HelloWorld.java
+            |```java
+            |public class HelloWorld {
+            |    public static void main(String[] args) {
+            |        System.out.println("Hello, World");
+            |    }
+            |}
+            |```
+            |```
+            |
+        """.trimMargin()
+
+        // when
+        val result = PromptOptimizer.trimCodeSpace(content)
+
+        // then
+        val expected = """```DevIn
+/write:HelloWorld.java
+```java
+public class HelloWorld {
+public static void main(String[] args) {
+System.out.println("Hello, World");
+}
+}
+```
+```"""
+
+        assertThat(result).isEqualTo(expected)
+    }
 }