CLJS-1465: doc for *main-cli-fn* refers to *main-fn*

Revise doc to refer to *main-cli-fn*, and also reflow
a little.

Author: mfikes

src/main/cljs/cljs/core.cljs

@@ -242,8 +242,8 @@
   (identical? (.-prototype (.-constructor x)) x))
 
 (def
-  ^{:doc "When compiled for a command-line target, whatever
-  function *main-fn* is set to will be called with the command-line
+  ^{:doc "When compiled for a command-line target, whatever function
+  *main-cli-fn* is set to will be called with the command-line
   argv as arguments"}
   *main-cli-fn* nil)