Add w.r.t to betterFullStop

[qiaojunfeng]

what is this pull request about?

Add w.r.t. to betterFullStop so that modifyLineBreaks does not break the sentence at w.r.t.

does this relate to an existing issue?

no

does this change any existing behaviour?

yes, will not break sentence at w.r.t.

what does this add?

currently betterFullStop includes e.g., i.e., etc, this PR adds w.r.t to it.

For example,

The derivative of $F(x) = x^2$ w.r.t. $x$ is $2x$.

the currently result is

The derivative of $F(x) = x^2$ w.r.t.
$x$ is $2x$.

with this PR, the result is

The derivative of $F(x) = x^2$ w.r.t. $x$ is $2x$.

how do I test this?

1. apply this PR
2. copy the previous example to a file a.tex
3. create a file localSettings.yaml with content

   modifyLineBreaks:
     oneSentencePerLine:
       manipulateSentences: 1

4. run with latexindent -m -l a.tex

anything else?

no

[cmhughes]

Great, thanks so much! This will be part of the next release.