Improve q and <tab> mappings in the quickfix list.

Use <c-w><c-p> instead of <c-w><c-w> because the former would always
move the cursor to the previously accessed window.

Modify the <tab> mapping to do the same (always move to the previously
accessed window). The command works as follows:

1. <c-w><c-p> moves to the previously accessed window
2. @=winnr("#") computes the window number of the quickfix window
3. <c-w>c closes the quickfix window (because it is preceded by a count)

Author: Lifepillar

autoload/ledger.vim

@@ -539,8 +539,8 @@ function! ledger#output(report)
   call append(0, a:report)
   setlocal nomodifiable
   " Set local mappings to quit window or lose focus.
-  nnoremap <silent> <buffer> <tab> <c-w><c-w>
-  nnoremap <silent> <buffer> q <c-w>c
+  nnoremap <silent> <buffer> <tab> <c-w><c-p>
+  nnoremap <silent> <buffer> q <c-w><c-p>@=winnr("#")<cr><c-w>c
   " Add some coloring to the report
   syntax match LedgerNumber /-\@1<!\d\+\([,.]\d\+\)\+/
   syntax match LedgerNegativeNumber /-\d\+\([,.]\d\+\)\+/