feat: Improve describe recent changes in system prompt (#113)

Co-authored-by: Petr Mironychev <9195189+Palm1r@users.noreply.github.com>

Author: p12tic

context/DocumentContextReader.cpp

@@ -275,8 +275,8 @@ LLMCore::ContextData DocumentContextReader::prepareContext(
     fileContext.append("\n ").append(getLanguageAndFileInfo());
 
     if (settings.useProjectChangesCache())
-        fileContext.append("\n ").append(
-            ChangesManager::instance().getRecentChangesContext(m_textDocument));
+        fileContext.append("Recent Project Changes Context:\n ")
+            .append(ChangesManager::instance().getRecentChangesContext(m_textDocument));
 
     return {.prefix = contextBefore, .suffix = contextAfter, .fileContext = fileContext};
 }

test/DocumentContextReaderTest.cpp

@@ -372,21 +372,24 @@ TEST_F(DocumentContextReaderTest, testPrepareContext)
         (ContextData{
             .prefix = "Line 0\nLine 1\nLin",
             .suffix = "e 2\nLine 3\nLine 4",
-            .fileContext = "\n Language:  (MIME: text/python) filepath: /path/to/file()\n\n\n "}));
+            .fileContext = "\n Language:  (MIME: text/python) filepath: /path/to/file()\n\n"
+                           "Recent Project Changes Context:\n "}));
 
     EXPECT_EQ(
         reader.prepareContext(2, 3, *createSettingsForLines(1, 1)),
         (ContextData{
             .prefix = "Line 1\nLin",
             .suffix = "e 2\nLine 3",
-            .fileContext = "\n Language:  (MIME: text/python) filepath: /path/to/file()\n\n\n "}));
+            .fileContext = "\n Language:  (MIME: text/python) filepath: /path/to/file()\n\n"
+                           "Recent Project Changes Context:\n "}));
 
     EXPECT_EQ(
         reader.prepareContext(2, 3, *createSettingsForLines(2, 2)),
         (ContextData{
             .prefix = "Line 0\nLine 1\nLin",
             .suffix = "e 2\nLine 3\nLine 4",
-            .fileContext = "\n Language:  (MIME: text/python) filepath: /path/to/file()\n\n\n "}));
+            .fileContext = "\n Language:  (MIME: text/python) filepath: /path/to/file()\n\n"
+                           "Recent Project Changes Context:\n "}));
 }
 
 #include "DocumentContextReaderTest.moc"