Word Wrap in Vim (preserving indentation) in Latex document - vim

Question

I was just looking at this post which describes how to wrap entire words in vim. I am looking for a way to key the indentation, or in my case, the lack of it.
I usually select a couple lines with V and press gq to reformat it and re-wrap the lines.
Let say, I have the following document
*Inside of window *Outside of window
|---------------------------------------|
|This is a bla like of text that will wr|ap here
|can you see the wrap |
| |
|---------------------------------------|
The result will be:
*Inside of window *Outside of window
|---------------------------------------|
|This is a bla like of text that will |
|wrap here can you see the wrap |
| |
|---------------------------------------|
So far so good.
Now Let say, I have the following document with some latex tags
*Inside of window *Outside of window
|---------------------------------------|
|\begin{abstract} |
|This is a bla like of text that will wr|ap here
|can you see the wrap |
|\end{abstract} |
| |
|---------------------------------------|
The result is the following, which contains an undesirable \t in the next line
*Inside of window *Outside of window
|---------------------------------------|
|\begin{abstract} |
|This is a bla like of text that will |
| wrap here can you see the wrap |
|\end{abstract} |
| |
|---------------------------------------|
But, my goal is to have the result like the following, without the undesirable \t in the next line.
*Inside of window *Outside of window
|---------------------------------------|
|\begin{abstract} |
|This is a bla like of text that will |
|wrap here can you see the wrap |
|\end{abstract} |
| |
|---------------------------------------|
I tried adding set breakindent to my .vimrc but it didn't work. Currently these are the lines I use regarding wrapping.
set wrap " Wrap
set textwidth=79 " Default Text Width

Answer 1

The indentation for Latex is determined by the GetTeXIndent() function (which can be found out via :setlocal indentexpr?). The corresponding script in $VIMRUNTIME/indent/tex.vim has documentation in its header. It mentions (among others) a config setting that affects the indentation of environments.
" * g:tex_noindent_env
"
" A list of environment names. separated with '\|', where no indentation is
" required. The default is 'document\|verbatim'.
If you add the \begin{...} item there (by putting the configuration into your ~/.vimrc), no additional indent will happen:
let g:tex_noindent_env .= '\|begin'
Caveat: I know very little about Latex syntax; this may have unwanted side effects to formatting elsewhere. Read the entire indent documentation to understand your options for tweaking it.