The offending passages are set out in the second edition in single inverted commas.

Attributes will normally be displayed within single inverted commas.

The point where a writer places a single comma can be crucial to the meaning of a scene, a chapter or an entire book.

Adjacent fields must be separated by a single comma.

"In order to fight against the house style you have to justify every single comma," he said.

But the argument turns on a single comma in the 14-page contract.

I agree with every single comma and semicolon in it.

- notice that in this case, single up inverted commas are used

A year without changing a single comma of this matter is an eternity.

Even now, that single missing comma carries more emotional weight than many lyricists manage in a lifetime.