docs updated, formatters moved to separate filenames

autoload/airline/extensions/tabline/unique_tail.vim

@@ -0,0 +1,27 @@
+" MIT License. Copyright (c) 2013 Bailey Ling.
+" vim: et ts=2 sts=2 sw=2
+
+function! airline#extensions#tabline#unique_tail#format(bufnr, buffers)
+  let duplicates = {}
+  let tails = {}
+  let map = {}
+  for nr in a:buffers
+    let name = bufname(nr)
+    if empty(name)
+      let map[nr] = '[No Name]'
+    else
+      let tail = fnamemodify(name, ':t')
+      if has_key(tails, tail)
+        let duplicates[nr] = nr
+      endif
+      let tails[tail] = 1
+      let map[nr] = airline#extensions#tabline#default#wrap_name(nr, tail)
+    endif
+  endfor
+
+  for nr in values(duplicates)
+    let map[nr] = airline#extensions#tabline#default#wrap_name(nr, fnamemodify(bufname(nr), ':p:.'))
+  endfor
+
+  return map[a:bufnr]
+endfunction