Begin cleaning up maps.vim

Added some useful unimpaired mappings and moved localleader to , to
prepare for separation of local and global leader mappings.

.config/nvim/maps.vim

@@ -12,14 +12,49 @@
 " backspace to switch to alternate (last) buffer
 nnoremap <BS> <C-^>
 
+" repeat the last substitute command with all its flags preserved
+noremap &
+      \ :&&<CR>
+ounmap &
+sunmap &
+
+" bracket pairings to go to the next/previous of:
+" (works with count prefixes)
+"
+" Argument list
+nnoremap [a
+      \ :previous<CR>
+nnoremap ]a
+      \ :next<CR>
+" Buffers
+nnoremap [b
+      \ :bprevious<CR>
+nnoremap ]b
+      \ :bnext<CR>
+" Quickfix list
+nnoremap [c
+      \ :cprevious<CR>
+nnoremap ]c
+      \ :cnext<CR>
+" Location list
+nnoremap [l
+      \ :lprevious<CR>
+nnoremap ]l
+      \ :lnext<CR>
+
 " set our leader key to space since with hjkl, space is largely useless
 let mapleader = "\<Space>"
-" maps the leader for buffer local mappings (e.g. vim-waikiki for files under
-" the root dir to the same key -- might lead to incompatibilities, will have
-" to test)
-let maplocalleader = "\<Space>"
-" set jk to escape, in case capslock is not mapped to escape on the system
-inoremap jk <ESC>
+" maps the leader for buffer local mappings
+" since we are (atm) using sneak to go fwd/bwd in fFtT searches, comma does
+" not do too many useful things and can be taken up as localleader
+let maplocalleader = ","
+
+" If we mapped localleader to comma, we can still get to its original function
+" by douple-tapping it.
+if maplocalleader ==# ','
+  noremap ,, ,
+  sunmap ,,
+endif
 
 " remove search highlights by pressing space+/ - the key for searching the
 " first place