Add guidance on placement of "only"

[julian-cable]

Guidance to add:
Misplaced "only". Ensure that "only" is placed directly before the word that it modifies, which often should not be a verb.

Original example:
"Users can only delete files that they own."
(Misleadingly suggests that users cannot take any actions other than deletion on those files)

Improvement example:
"Users can delete only files that they own."
(Clarifies the files that deletion applies to.)

[julian-cable]

Added guidance and examples.