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Add more spacing to rls error messages #1748

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@segeljakt

Description

Information

VIM version

NVIM v0.3.2-dev
Build type: Release

Operating System:

macOS High Sierra 10.13.6

:ALEInfo

 ALEInfo
 Current Filetype: rust
Available Linters: ['cargo', 'rls', 'rustc']
 Current Filetype: rust
Available Linters: ['cargo', 'rls', 'rustc']
  Enabled Linters: ['rls']
 Suggested Fixers:
  'remove_trailing_lines' - Remove all blank lines at the end of a file.
  'rustfmt' - Fix Rust files with Rustfmt.
  'trim_whitespace' - Remove all trailing whitespace characters at the end of every line.
 Linter Variables:
let g:ale_rust_rls_executable = 'rls'
let g:ale_rust_rls_toolchain = 'nightly'
 Global Variables:
let g:ale_cache_executable_check_failures = v:null
let g:ale_change_sign_column_color = 0
let g:ale_command_wrapper = ''
let g:ale_completion_delay = v:null
let g:ale_completion_enabled = 0
let g:ale_completion_max_suggestions = v:null
let g:ale_echo_cursor = 1
let g:ale_echo_msg_error_str = 'Error'
let g:ale_echo_msg_format = '%code: %%s'
let g:ale_echo_msg_info_str = 'Info'
let g:ale_echo_msg_warning_str = 'Warning'
let g:ale_enabled = 1
let g:ale_fix_on_save = 0
let g:ale_fixers = {}
let g:ale_history_enabled = 1
let g:ale_history_log_output = 1
let g:ale_keep_list_window_open = 0
let g:ale_lint_delay = 200
let g:ale_lint_on_enter = 1
let g:ale_lint_on_filetype_changed = 1
let g:ale_lint_on_save = 1
let g:ale_lint_on_text_changed = 'always'
let g:ale_lint_on_insert_leave = 0
let g:ale_linter_aliases = {}
let g:ale_linters = {'rust': ['rls']}
let g:ale_linters_explicit = 0
let g:ale_list_window_size = 10
let g:ale_list_vertical = 0
let g:ale_loclist_msg_format = '%code: %%s'
let g:ale_max_buffer_history_size = 20
let g:ale_max_signs = -1
let g:ale_maximum_file_size = v:null
let g:ale_open_list = 0
let g:ale_pattern_options = {}
let g:ale_pattern_options_enabled = 0
let g:ale_set_balloons = 0
let g:ale_set_highlights = 1
let g:ale_set_loclist = 1
let g:ale_set_quickfix = 0
let g:ale_set_signs = 1
let g:ale_sign_column_always = 0
let g:ale_sign_error = '>>'
let g:ale_sign_info = '--'
let g:ale_sign_offset = 1000000
let g:ale_sign_style_error = '>>'
let g:ale_sign_style_warning = '--'
let g:ale_sign_warning = '--'
let g:ale_statusline_format = v:null
let g:ale_type_map = {}
let g:ale_use_global_executables = v:null
let g:ale_warn_about_trailing_blank_lines = 1
let g:ale_warn_about_trailing_whitespace = 1
  Command History:
(started) ['/bin/zsh', '-c', '''rls'' +''nightly''']

What went wrong

When I use rls, it appears to output multiple error messages per error. For example, in this case it outputs three messages for one error. I can live with this, but it would be nice if spaces were inserted between the messages.

Reproducing the bug

I tested it with a bare ~/.config/nvim/init.vim contains these lines:

set nocp
call plug#begin('~/.local/share/nvim/plugged')
Plug 'w0rp/ale'
call plug#end()
let g:ale_linters = {'rust': ['rls']}

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