checkout: fix documentation code alignment

include/git2/checkout.h

@@ -40,23 +40,25 @@ typedef struct git_checkout_opts {
  * @param repo repository to check out (must be non-bare)
  * @param opts specifies checkout options (may be NULL)
  * @param stats structure through which progress information is reported
- * @return 0 on success, GIT_ERROR otherwise (use giterr_last for information about the error)
+ * @return 0 on success, GIT_ERROR otherwise (use giterr_last for information
+ * about the error)
  */
-GIT_EXTERN(int) git_checkout_head(git_repository *repo,
+GIT_EXTERN(int) git_checkout_head(
+	git_repository *repo,
 	git_checkout_opts *opts,
 	git_indexer_stats *stats);
 
-
-
 /**
  * Updates files in the working tree to match a commit pointed to by a ref.
  *
  * @param ref reference to follow to a commit
  * @param opts specifies checkout options (may be NULL)
  * @param stats structure through which progress information is reported
- * @return 0 on success, GIT_ERROR otherwise (use giterr_last for information about the error)
+ * @return 0 on success, GIT_ERROR otherwise (use giterr_last for information
+ * about the error)
  */
-GIT_EXTERN(int) git_checkout_reference(git_reference *ref,
+GIT_EXTERN(int) git_checkout_reference(
+	git_reference *ref,
 	git_checkout_opts *opts,
 	git_indexer_stats *stats);