DOC: Make `make conan` more prominent.

For issue #37 (closed)

Summary

Make make conan more prominent.

Focus

Does the generated documentation look OK?

Test Environment

make doc

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass (only an unrelated xfail passes currently, see caosdb-server#174 (closed))
• Reference related Issues
• Up-to-date CHANGELOG.md
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

doc/Examples.rst

@@ -19,6 +19,7 @@ You can print the full version of the server that you are connected to (and
 therby test the connection) via: 
 
 .. code:: cpp
+
   // get version info of the server
   connection.RetrieveVersionInfo()
   const auto &v_info = connection->GetVersionInfo();
@@ -57,8 +58,9 @@ you want to retrieve an Entity with id=123. This is done via
 
 
 You can then use the getter methods like :cpp:any:`GetId<caosdb::entity::Entity::GetId>`,
-:cpp:any:`GetParents<caosdb::entity::Entity::GetParents>`, or :cpp:any:`GetProperties`<caosdb::entity::Entity::GetProperties>` to get the
-name, the parents, or the properties of the retrieved entity.
+:cpp:any:`GetParents<caosdb::entity::Entity::GetParents>`, or
+:cpp:any:`GetProperties`<caosdb::entity::Entity::GetProperties>` to get the name, the parents, or
+the properties of the retrieved entity.
 
 Retrieving multiple entities works in the same way. Type
 
@@ -83,9 +85,9 @@ transaction manually. This is done by
    transaction->RetrieveById("1233");
    auto status = transaction->Execute();
 
-A result set can be obtained
-via :cpp:any:`GetResultSet`<caosdb::transaction::Transaction::GetResultSet>` which contains the resulting entities
-and can, e.g., be checked for length. 
+A result set can be obtained via
+:cpp:any:`GetResultSet`<caosdb::transaction::Transaction::GetResultSet>` which contains the
+resulting entities and can, e.g., be checked for length.
 
 Execute queries
 ---------------
@@ -147,6 +149,7 @@ Insert, update and delete  operations function the same way. The respective
 task is added to a transaction and the transaction is executed.
 
 .. code:: cpp
+
   const auto &connection =
       caosdb::connection::ConnectionManager::GetDefaultConnection();
 
@@ -202,7 +205,7 @@ task is added to a transaction and the transaction is executed.
 
 
 Up- and Download a file
----------------
+-----------------------
 
 .. code:: cpp