chore: Correct some minor codeblock issues. (#1289)

* Remove duplicated code line

* Fix indentation in codeblock

Author: gemmaro

content/develop/tutorials/execution-flow/fragments/trigger-a-full-script-rerun-from-a-fragment.md

@@ -489,7 +489,6 @@ Now, you have a functioning app that uses a fragment to prevent unnecessarily re
        if "previous_date" not in st.session_state:
            st.session_state.previous_date = selected_date
        previous_date = st.session_state.previous_date
-       previous_date = st.session_state.previous_date
        st.session_state.previous_date = selected_date
        is_new_month = selected_date.replace(day=1) != previous_date.replace(day=1)
        if is_new_month:

content/develop/tutorials/llms/llm-quickstart.md

@@ -103,7 +103,7 @@ To start, create a new Python file and save it as `streamlit_app.py` in the roo
 
    ```python
    def generate_response(input_text):
-   model = ChatOpenAI(temperature=0.7, api_key=openai_api_key)
+       model = ChatOpenAI(temperature=0.7, api_key=openai_api_key)
        st.info(model.invoke(input_text))
    ```