Formatted all pages according to guidelines.

pages/common/mkdir.md

@@ -1,11 +1,11 @@
 # mkdir
 
-> Creates a directory
+> Creates a directory.
 
-- creates a directory in current folder or given path
+- Creates a directory in current folder or given path:
 
 `mkdir {{directory}}`
 
-- creates directories recursively (useful for creating nested dirs)
+- Creates directories recursively (useful for creating nested dirs):
 
 `mkdir -p {{path}}`