G94: Providing short text alternative for non-text content that serves the same purpose and presents the same information as the non-text content

See URL: http://www.w3.org/TR/2012/NOTE-WCAG20-TECHS-20120103/G94
Under Description, read the sentence after paragraph 3. This contains an
extra 'a,' given as: "In deciding what text to include in the alternative,
it is a often a good idea to consider the following questions:"
Proposed Change: "In deciding what text to include in the alternative, it
is often a good idea to consider the following questions:"

-Devarshi