Pandoc recognizes an abbreviation and inserts a nonbreaking

space (among other things, this prevents a sentence-ending

space from being inserted in LaTeX output).

```

% pandoc -t native

Mr. Bob

^D

[Para [Str "Mr.\160Bob"]]

```

Here pandoc readjusts the softbreak so that the nonbreaking

space can be inserted:

```

% pandoc -t native

Hi Mr.

Bob

^D

[Para [Str "Hi",SoftBreak,Str "Mr.\160Bob"]]

```

If you don't want this to happen you can escape the period:

```

% pandoc -t native

Hi Mr\. Bob

^D

[Para [Str "Hi",Space,Str "Mr.",Space,Str "Bob"]]

```