I need a shell Script to run in BBEdit. I want to add two carriagw returns at the end of each sentence, so that

Ayre Acoustics offered me a chance to spend as much time as I needed with its new QB-9 Twenty digital to analog converter and the previous generation QB-9 DSD. Ayre kindly sent both units to me and said, “Let us know if you have questions.” At first blush, one would think the opportunity was a chance to compare these two components in the same system, as if doing a manufacturer sponsored shootout.

Becomes

Ayre Acoustics offered me a chance to spend as much time as I needed with its new QB-9 Twenty digital to analog converter and the previous generation QB-9 DSD.

Ayre kindly sent both units to me and said, “Let us know if you have questions.”

At first blush, one would think the opportunity was a chance to compare these two components in the same system, as if doing a manufacturer sponsored shootout.

I keep run into problems trying to escape “.” in sed and awk.