Escaping period in Ack.vim

Question

I'm looking forward to search for the following pattern with Ack.vim:

.section

Where . should only match a period, and not any character.

I tried the following:

• \.section
• [.]section
• -Q .section

What is the correct way of escaping the period?

Answer 1

From the documentation:

For instance, '#'. You have to escape it like this :Ack '\\\#define foo' to search for '#define foo'.

Use: :Ack \\\.section

Answer 2

From the documentation:

For instance, '#'. You have to escape it like this :Ack '\\\#define foo' to search for '#define foo'.