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Description

The point must be escaped if literal meaning is required.

Source

O.K.

Case 1

Regular Expression: .
First match:O.K.
All matches:O.K.

Case 2

Regular Expression: \.
First match:O.K.
All matches:O.K.

Case 3

Regular Expression: \..\.
First match:O.K.
All matches:O.K.