Fix type in API doc

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

doc/api/repositories.md

@@ -380,7 +380,7 @@ POST /projects/:id/repository/files
 Parameters:
 + `file_name` (required) - The name of new file. Ex. class.rb
-+ `file_path` (optiona) - The path to new file. Ex. lib/
++ `file_path` (optional) - The path to new file. Ex. lib/
 + `branch_name` (required) - The name of branch
 + `content` (required) - File content
 + `commit_message` (required) - Commit message

lib/api/files.rb

@@ -9,7 +9,7 @@ module API
       #
       # Parameters:
       #   file_name (required) - The name of new file. Ex. class.rb
-      #   file_path (optiona) - The path to new file. Ex. lib/
+      #   file_path (optional) - The path to new file. Ex. lib/
       #   branch_name (required) - The name of branch
       #   content (required) - File content
       #   commit_message (required) - Commit message