Slight improvement to paste indentation for Python buffers

src/source_base.cpp

@@ -1051,6 +1051,12 @@ void Source::BaseView::paste() {
           first_paste_line_has_tabs = true;
           paste_line_tabs = tabs;
         }
+        else if(language_id == "python") {
+          if(!line.empty() && line.back() == ':') {
+            first_paste_line_has_tabs = true;
+            paste_line_tabs = tabs;
+          }
+        }
         first_paste_line = false;
       }
       else if(!empty_line)