Major vimrc cleanup

- Add comments for uncommented things
- Remove ancient pre-vim 7 conditionals
- Normalize spacing in sets and lets
- Make tabs visible
- Change trailing space visibilty from period to floating dot
- Tune up ALE python linting with pep8, black, isort

.vimrc

@@ -1,4 +1,4 @@
-" Hack my TERM to get around vim ignoring terminfo lol
+" Hack my TERM to get around vim ignoring terminfo
 if &term=="alacritty"
 	let &term="xterm-256color"
 endif
@@ -16,12 +16,8 @@ call vundle#begin()
 
 " Plugin execution
 Plugin 'VundleVim/Vundle.vim'
-
-if v:version >= 704
 Plugin 'vim-pandoc/vim-pandoc'
 Plugin 'vim-pandoc/vim-pandoc-syntax'
-endif
-
 Plugin 'tpope/vim-surround'
 Plugin 'mhinz/vim-startify'
 Plugin 'vim-airline/vim-airline'
@@ -36,19 +32,23 @@ filetype plugin indent on
 " Formatters for ale to reformat documents into a unified structure
 let g:ale_fixers={
 	\'*': ['remove_trailing_lines', 'trim_whitespace'],
+	\'python': ['autopep8', 'black', 'isort'],
 	\'elixir': ['mix_format']
 	\}
 
+" Set python line length in all the linters/fixers
+let g:ale_python_pylint_options = '--max-line-length 119'
+let g:ale_python_autopep8_options = '--max-line-length 119'
+let g:ale_python_black_options = '-l 119'
+
 " Visual themeing
-if exists('+termguicolors')
 set termguicolors               "Enable 256 colors
-endif
+set t_Co=256                    "Limit vim to 256 colors
-set t_Co=256
 set scrolloff=5                 "Always display 5 lines below cursor when scrolling
-colorscheme base16
+colorscheme base16              "Use my custom built color scheme
-let g:airline_theme='base16'
+let g:airline_theme='base16'    "Use the scheme for airline too
-set background=dark
+set background=dark             "Inform vim I use a black background terminal
-let g:airline_powerline_fonts = 1
+let g:airline_powerline_fonts=1 "Use powerline glyphs in airline
 
 " Set UTF-8 default
 set encoding=utf-8
@@ -59,22 +59,22 @@ set ttymouse=
 
 " Searching Modifications
 set hlsearch    "highlight search matches
-set incsearch
+set incsearch   "enable incremental search
-set ignorecase
+set ignorecase  "ignore case in search
-set smartcase
+set smartcase   " ...unless you specify case yourself
 
 " Tabs and Whitespace
-if exists('+breakindent')
+set breakindent "add soft indents when soft wrapping
-    set breakindent
+set autoindent      "try to figure out automatic indents while writing code
-endif
+set smartindent     " ...and try to figure it out based on language
-set autoindent
+set nowrap          "don't soft wrap by default
-set smartindent
-set nowrap
 set tabstop=4
 set shiftwidth=4
-set list listchars=tab:\ \ ,trail:.
 
-" Command completion
+"display special glyphs for tabs and trailing whitespace
+set list listchars=tab:»·,trail:·
+
+" dmenu style command completion
 set wildmenu
 set wildignorecase
 
@@ -101,7 +101,7 @@ let g:pandoc#syntax#conceal#urls = 1
 let g:pandoc#hypertext#create_if_no_alternates_exists=1
 
 " Make link follows split horizontally since most of my terms are tall
-" Also work around a netrw bug that opens every no-modify
+" Also work around a netrw bug that opens everything no-modify
 let g:pandoc#hypertext#split_open_cmd="botright split +set\\ modifiable"
 
 " Allow folding at fold markers to let me collapse sub-sections of lists
@@ -110,7 +110,7 @@ let g:pandoc#folding#vim_markers_in_comments_only = 0
 " Unfold everything by default
 set foldlevel=99
 
-" Bracketed Paste
+" Bracketed paste
 let &t_ti=&t_ti . "\e[?2004h"
 let &t_te="\e[?2004l" . &t_te
 function XTermPasteBegin(ret)