Refactor global variables into script local variables.

These variables only occur in one file each.  By making them script local
variables this is "documented" in the code.  At the same time the global
namespace is polluted less.

Changed:
    g:bundle_names          -> s:bundle_names
    g:vundle_last_status    -> s:last_status
    g:vundle_log_file       -> s:log_file
    g:vundle_view           -> s:view

autoload/vundle/config.vim

@@ -43,7 +43,7 @@ func! vundle#config#init()
   if !exists('g:bundles') | let g:bundles = [] | endif
   call s:rtp_rm_a()
   let g:bundles = []
-  let g:bundle_names = {}
+  let s:bundle_names = {}
 endf
 
 
@@ -91,14 +91,14 @@ endf
 " return -- 0 if the bundle's name has been seen before, 1 otherwise
 " ---------------------------------------------------------------------------
 funct! s:check_bundle_name(bundle)
-  if has_key(g:bundle_names, a:bundle.name)
+  if has_key(s:bundle_names, a:bundle.name)
     echoerr 'Vundle error: Name collision for Plugin ' . a:bundle.name_spec .
-          \ '. Plugin ' . g:bundle_names[a:bundle.name] .
+          \ '. Plugin ' . s:bundle_names[a:bundle.name] .
           \ ' previously used the name "' . a:bundle.name . '"' .
           \ '. Skipping Plugin ' . a:bundle.name_spec . '.'
     return 0
   endif
-  let g:bundle_names[a:bundle.name] = a:bundle.name_spec
+  let s:bundle_names[a:bundle.name] = a:bundle.name_spec
   return 1
 endf
 

autoload/vundle/installer.vim

@@ -55,11 +55,11 @@ func! s:process(bang, cmd)
 
     exec ':norm '.a:cmd
 
-    if 'error' == g:vundle_last_status
+    if 'error' == s:last_status
       let msg = 'With errors; press l to view log'
     endif
 
-    if 'updated' == g:vundle_last_status && empty(msg)
+    if 'updated' == s:last_status && empty(msg)
       let msg = 'Plugins updated; press u to view changelog'
     endif
 
@@ -118,7 +118,7 @@ func! vundle#installer#run(func_name, name, ...) abort
     throw 'whoops, unknown status:'.status
   endif
 
-  let g:vundle_last_status = status
+  let s:last_status = status
 
   return status
 endf

autoload/vundle/scripts.vim

@@ -54,12 +54,12 @@ endf
 " View the logfile after an update or installation.
 " ---------------------------------------------------------------------------
 func! s:view_log()
-  if !exists('g:vundle_log_file')
-    let g:vundle_log_file = tempname()
+  if !exists('s:log_file')
+    let s:log_file = tempname()
   endif
 
-  call writefile(g:vundle_log, g:vundle_log_file)
-  execute 'silent pedit ' . g:vundle_log_file
+  call writefile(g:vundle_log, s:log_file)
+  execute 'silent pedit ' . s:log_file
 
   wincmd P | wincmd H
 endf
@@ -139,15 +139,15 @@ endf
 "            strings)
 " ---------------------------------------------------------------------------
 func! vundle#scripts#view(title, headers, results)
-  if exists('g:vundle_view') && bufloaded(g:vundle_view)
-    exec g:vundle_view.'bd!'
+  if exists('s:view') && bufloaded(s:view)
+    exec s:view.'bd!'
   endif
 
   exec 'silent pedit [Vundle] '.a:title
 
   wincmd P | wincmd H
 
-  let g:vundle_view = bufnr('%')
+  let s:view = bufnr('%')
   "
   " make buffer modifiable
   " to append without errors