Docs: Replace 'training whitespaces' with 'trailing whitespaces'

diff --git a/doc/21-development.md b/doc/21-development.md
index 8db0640ea492fcc30c87c14480c4a2cf44dc21f6..bf5cf8b20d70ed2647f90c9054a218b7fc6c8a8e 100644 (file)
--- a/doc/21-development.md
+++ b/doc/21-development.md
@@ -1188,7 +1188,7 @@ required though.
 #### Whitespace Cleanup <a id="development-develop-choose-editor-whitespaces"></a>
 
 Patches must be cleaned up and follow the indent style (tabs instead of spaces).
-You should also remove any training whitespaces.
+You should also remove any trailing whitespaces.
 
 `git diff` allows to highlight such.