support multiple accents in the same section (#203).

autoload/airline/builder.vim

@@ -23,12 +23,17 @@ function! s:prototype.add_section(group, contents)
     let self._line .= '%#'.a:group.'#'
   endif
 
-  let accent = matchstr(a:contents, 'airline_accent_\zs[^#]*\ze')
-  let contents = substitute(a:contents, 'airline_accent', a:group, 'g')
-  if contents != a:contents
+  let contents = []
+  let content_parts = split(a:contents, 'airline_accent')
+  for cpart in content_parts
+    let accent = matchstr(cpart, '_\zs[^#]*\ze')
     call airline#highlighter#add_accent(a:group, accent)
-  endif
-  let self._line .= contents
+    call add(contents, cpart)
+  endfor
+  let line = join(contents, a:group)
+  let line = substitute(line, '__restore__', a:group, 'g')
+
+  let self._line .= line
   let self._curgroup = a:group
 endfunction
 

autoload/airline/section.vim

@@ -49,6 +49,9 @@ function! s:create(parts, append)
     endif
 
     let val .= partval
+    if exists('part.accent')
+      let val .= '%#__restore__#'
+    endif
     let _ .= val
   endfor
   return _