reset: Enhance documentation

include/git2/reset.h

@@ -28,7 +28,7 @@ typedef enum {
  * Sets the current head to the specified commit oid and optionally
  * resets the index and working tree to match.
  *
- * SOFT reset means the head will be moved to the commit.
+ * SOFT reset means the Head will be moved to the commit.
  *
  * MIXED reset will trigger a SOFT reset, plus the index will be replaced
  * with the content of the commit tree.
@@ -41,14 +41,14 @@ typedef enum {
  *
  * @param repo Repository where to perform the reset operation.
  *
- * @param target Object to which the Head should be moved to. This object
+ * @param target Committish to which the Head should be moved to. This object
  * must belong to the given `repo` and can either be a git_commit or a
  * git_tag. When a git_tag is being passed, it should be dereferencable
  * to a git_commit which oid will be used as the target of the branch.
  *
  * @param reset_type Kind of reset operation to perform.
  *
- * @return 0 on success or an error code < 0
+ * @return 0 on success or an error code
  */
 GIT_EXTERN(int) git_reset(
 	git_repository *repo, git_object *target, git_reset_t reset_type);