Fix up tool/auto-style.rb

Do not clear the commit-wide flags per file.

Author: nobu

tool/auto-style.rb

@@ -233,11 +233,10 @@ def with_clean_env
 
   if File.fnmatch?("*.[ch]", f, File::FNM_PATHNAME) &&
      !DIFFERENT_STYLE_FILES.any? {|pat| File.fnmatch?(pat, f, File::FNM_PATHNAME)}
-    orig = src.dup
-    src.gsub!(/^\w+\([^(\n)]*?\)\K[ \t]*(?=\{$)/, "\n")
-    src.gsub!(/^([ \t]*)\}\K[ \t]*(?=else\b)/, "\n" '\1')
-    src.gsub!(/^[ \t]*\}\n\K\n+(?=[ \t]*else\b)/, '')
-    indent = indent0 = src != orig
+    indent0 = true if src.gsub!(/^\w+\([^(\n)]*?\)\K[ \t]*(?=\{$)/, "\n")
+    indent0 = true if src.gsub!(/^([ \t]*)\}\K[ \t]*(?=else\b)/, "\n" '\1')
+    indent0 = true if src.gsub!(/^[ \t]*\}\n\K\n+(?=[ \t]*else\b)/, '')
+    indent ||= indent0
   end
 
   if trailing0 or eofnewline0 or expandtab0 or indent0