thodg/libgit2

diff --git a/include/git2/apply.h b/include/git2/apply.h
index b248eaa..bc637df 100644
--- a/include/git2/apply.h
+++ b/include/git2/apply.h
@@ -100,6 +100,7 @@ GIT_EXTERN(int) git_apply_options_init(git_apply_options *opts, unsigned int ver
  * @param preimage the tree to apply the diff to
  * @param diff the diff to apply
  * @param options the options for the apply (or null for defaults)
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_apply_to_tree(
 	git_index **out,
@@ -137,6 +138,7 @@ typedef enum {
  * @param diff the diff to apply
  * @param location the location to apply (workdir, index or both)
  * @param options the options for the apply (or null for defaults)
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_apply(
 	git_repository *repo,
diff --git a/include/git2/common.h b/include/git2/common.h
index 8dd30d5..dee260e 100644
--- a/include/git2/common.h
+++ b/include/git2/common.h
@@ -356,6 +356,11 @@ typedef enum {
  *		>
  *		> - `ciphers` is the list of ciphers that are eanbled.
  *
+ *	* opts(GIT_OPT_GET_USER_AGENT, git_buf *out)
+ *
+ *		> Get the value of the User-Agent header.
+ *		> The User-Agent is written to the `out` buffer.
+ *
  *	* opts(GIT_OPT_ENABLE_OFS_DELTA, int enabled)
  *
  *		> Enable or disable the use of "offset deltas" when creating packfiles,
diff --git a/include/git2/indexer.h b/include/git2/indexer.h
index 8059e4d..a434d24 100644
--- a/include/git2/indexer.h
+++ b/include/git2/indexer.h
@@ -51,7 +51,7 @@ typedef struct git_indexer_progress {
  * Type for progress callbacks during indexing.  Return a value less
  * than zero to cancel the indexing or download.
  *
- * @param stats Structure containing information about the state of the tran    sfer
+ * @param stats Structure containing information about the state of the transfer
  * @param payload Payload provided by caller
  */
 typedef int GIT_CALLBACK(git_indexer_progress_cb)(const git_indexer_progress *stats, void *payload);
@@ -64,6 +64,7 @@ typedef struct git_indexer_options {
 
 	/** progress_cb function to call with progress information */
 	git_indexer_progress_cb progress_cb;
+
 	/** progress_cb_payload payload for the progress callback */
 	void *progress_cb_payload;
 
diff --git a/include/git2/tree.h b/include/git2/tree.h
index d7545ac..f2289fc 100644
--- a/include/git2/tree.h
+++ b/include/git2/tree.h
@@ -334,6 +334,7 @@ GIT_EXTERN(int) git_treebuilder_insert(
  *
  * @param bld Tree builder
  * @param filename Filename of the entry to remove
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_treebuilder_remove(
 	git_treebuilder *bld, const char *filename);
@@ -463,6 +464,7 @@ typedef struct {
  * @param baseline the tree to base these changes on
  * @param nupdates the number of elements in the update list
  * @param updates the list of updates to perform
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_tree_create_updated(git_oid *out, git_repository *repo, git_tree *baseline, size_t nupdates, const git_tree_update *updates);