Correction of spelling errors (#388)

CONTRIBUTING.md

@@ -93,7 +93,7 @@ Custom options:
 
 ## Writing Tests
 
-Any new new component or change to an existing one should be covered by tests to ensure that the code works, and that it keeps working into the future.
+Any new component or change to an existing one should be covered by tests to ensure that the code works, and that it keeps working into the future.
 This section will help you in adding your own tests to this collection.
 
 ### Plugins

roles/step_bootstrap_host/README.md

@@ -44,7 +44,7 @@ It will:
 - Default: `step-cli`
 
 ##### `step_cli_install_dir`
-- Used if the binary defined by `step_cli_executable` is not found on the system and `step_cli_executable` contains a executable name
+- Used if the binary defined by `step_cli_executable` is not found on the system and `step_cli_executable` contains an executable name
 - Sets the directory to install `step_cli_executable` into
 - The directory must already exist
 - Ignored if `step_cli_executable` contains a directory already

roles/step_ca/README.md

@@ -63,7 +63,7 @@ It is thus **very** important that you **back up your root key and password** in
 - Default: `step-cli`
 
 ##### `step_cli_install_dir`
-- Used if `step_cli_executable` is not found and contains a executable name
+- Used if `step_cli_executable` is not found and contains an executable name
 - Sets the directory to install `step_cli_executable` into
 - The directory must already exist
 - Ignored if `step_cli_executable` contains a path already