I.2: Avoid non-const global variables

[jonnygrant]

I.2 has the following:

"Alternative: If you use global (more generally namespace scope) data to avoid copying, consider passing the data as an object by reference to const. "

I marked part in bold italic. I suggest amending it to read:

"Alternative: If you use global (more generally namespace scope) data to avoid copying, consider passing the data as a const reference to an object. "

[iglesias]

I suggest keeping it as it is, avoiding to rewrite

'passing the data as an object by reference to const'

'passing the data as a const reference to an object'.