This is how it looks in my file.. i recommend outcommenting the old line. then you can allways change back
// Start the loop.
while ( have_posts() ) : the_post();
/*
* Include the Post-Format-specific template for the content.
* If you want to override this in a child theme, then include a file
* called content-___.php (where ___ is the Post Format name) and that will be used instead.
*/
get_template_part( 'content', get_post_format() ); /*THIS LINES MAKES YOU SHOW WHOLE POST ON BLOG PAGE INSTEAD OF SUMMARY*/
get_template_part( 'content-search', get_post_format() ); /*THIS LINES MAKES YOU SHOW A SUMMARY POST ON THE BLOG PAGE INSTEAD OF THE WHOLE POST */
// End the loop.