* Solution for add-elements-at-a-specific-index-in-a-linked-list.english.md
* Solution check-if-an-element-is-present-in-a-binary-search-tree.english.md
* Solution for remove-elements-from-a-linked-list-by-index.english.md
* change indent level to 2 space for each level
* change indent level to 2 space
* change indent level to 2 space
* delete unnecessary new lines
* keep the same seed format , and delete unnecessary new lines
* delete unnecessary new lines
* fix: added review suggestions
* fix: Added link and code tags