Add doc for g:clojure_special_indent_words

Closes #6

Author: guns

doc/clojure.txt

@@ -91,6 +91,17 @@ Each candidate word is tested for special treatment in this order:
     3. Return true if word matches a pattern in *g:clojure_fuzzy_indent_patterns*
     4. Return false and indent normally otherwise
 
+                                          *g:clojure_special_indent_words*
+
+Some forms in Clojure are indented so that every subform is indented only two
+spaces, regardless of 'lispwords'. If you have a custom construct that should
+be indented in this idiosyncratic fashion, you can add your symbols to the
+default list below.
+>
+    " Default
+    let g:clojure_special_indent_words = 'deftype,defrecord,reify,proxy,extend-type,extend-protocol,letfn'
+<
+
                                        *g:clojure_align_multiline_strings*
 
 When indenting multiline strings, align subsequent lines to the column

indent/clojure.vim

@@ -237,8 +237,8 @@ if exists("*searchpairpos")
         " Now we have to reimplement lispindent. This is surprisingly easy, as
         " soon as one has access to syntax items.
         "
-        " - Check whether we are in a special position after deftype, defrecord,
-        "   reify, proxy or letfn. These are special cases.
+        " - Check whether we are in a special position after a word in
+        "   g:clojure_special_indent_words. These are special cases.
         " - Get the next keyword after the (.
         " - If its first character is also a (, we have another sexp and align
         "   one column to the right of the unmatched (.