Update runtime files. Add support for J.

runtime/indent/j.vim

@@ -0,0 +1,37 @@
+" Vim indent file
+" Language:	J
+" Maintainer:	David Bürgin <676c7473@gmail.com>
+" Last Change:	2013-09-21
+
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+
+setlocal indentexpr=GetJIndent()
+setlocal indentkeys-=0{,0},\:,0#
+setlocal indentkeys+=0),=case.,=catch.,=catchd.,=catcht.,=do.,=else.,=elseif.,=end.,=fcase.
+
+let b:undo_indent = "setl indk< inde<"
+
+if exists("*GetJIndent")
+  finish
+endif
+
+function GetJIndent()
+  let prevlnum = prevnonblank(v:lnum-1)
+  if prevlnum == 0
+    return 0
+  endif
+
+  let indent = indent(prevlnum)
+  if getline(prevlnum) =~# '^\s*\%(case\|catch[dt]\=\|do\|else\%(if\)\=\|fcase\|for\%(_\a\k*\)\=\|if\|select\|try\|whil\%(e\|st\)\)\.'
+    if getline(prevlnum) !~# '\<end\.'
+      let indent += &shiftwidth
+    endif
+  endif
+  if getline(v:lnum) =~# '^\s*\%(case\|catch[dt]\=\|do\|else\%(if\)\=\|end\|fcase\)\.'
+    let indent -= &shiftwidth
+  endif
+  return indent
+endfunction