Update core-code-style.md

docs/internals/core-code-style.md

@@ -196,7 +196,7 @@ $sql = "SELECT *"
 
 ### 5.3 arrays
 
-For arrays we're using PHP 5.3 short array syntax.
+For arrays we're using PHP 5.4 short array syntax.
 
 #### Numerically indexed
 
@@ -442,4 +442,4 @@ Properties allowing to configure component not to do something should accept val
 
 - use lower case
 - use plural form for nouns which represent objects (e.g. validators)
-- use singular form for names representing relevant functionality/features (e.g. web)
+- use singular form for names representing relevant functionality/features (e.g. web)
\ No newline at end of file