Stop highlighting trailing whitespace for Go files in Vim

Question

For some reason it seems the default for vim with Go files is to highlight trailing whitespace in red. In a way this is nice, but mostly I find it annoying because every time I type a space it starts as a red highlight. Is there a way to stop this behavior? I've only experienced this with Go files. Below is my vimrc, but I don't think I put anything there that would affect it.

set nocompatible
syntax on
set autoindent
set tabstop=4 softtabstop=0
autocmd FileType go set tabstop=8 softtabstop=0
set formatoptions=tcroql
set relativenumber
set incsearch
set hlsearch
set smartindent
filetype indent on

Answer 1

From go.vim Vim syntax file:

"   There are some options for customizing the highlighting; the recommended
"   settings are the default values, but you can write:
"     let OPTION_NAME = 0
"   in your ~/.vimrc file to disable particular options.

Put in your .vimrc

let g:go_highlight_trailing_whitespace_error=0

There are these other options:

"   - g:go_highlight_array_whitespace_error
"     Highlights white space after "[]".
"   - g:go_highlight_chan_whitespace_error
"     Highlights white space around the communications operator that don't
"     follow the standard style.
"   - g:go_highlight_extra_types
"     Highlights commonly used library types (io.Reader, etc.).
"   - g:go_highlight_space_tab_error
"     Highlights instances of tabs following spaces.

If you still like the highlighting of trailing whitespaces but not during the typing, you can try

au InsertEnter *.go match goSpaceError /\s\+\%#\@<!$/
au InsertLeave *.go match goSpaceError /\s\+$/

Read more in Highlight unwanted spaces from wikia.