fix(elixir): separate function from parameter matching

Previous queries were mixing the parameter matches and the function
matches into the same query. This would make it so that functions that
didn't have parameters wouldn't match @function.inner or @function.outer
queries.

Separating them makes it easier to focus on the specifics of fulfilling
each query. This should resolve issue #249.

queries/elixir/textobjects.scm

@@ -28,12 +28,29 @@
   (do_block "do" . (_) @class.inner . "end")
 ) @class.outer
 
-; Function, Parameter, and Call Objects
+; Parameters
+(call 
+  target: ((identifier) @_identifier (#any-of? @_identifier 
+    "def" 
+    "defmacro" 
+    "defmacrop" 
+    "defn" 
+    "defnp" 
+    "defp"
+  ))
+  (arguments (call [
+    (arguments (_) @parameter.inner . "," @_delimiter)
+    (arguments ((_) @parameter.inner) @_delimiter .) 
+  ] (#make-range! "parameter.outer" @parameter.inner @_delimiter)))
+) @function.outer
+
+; Function and Call Objects
 (anonymous_function
   (stab_clause 
     right: (body) @function.inner)
 ) @function.outer
 
+; single child
 (call 
   target: ((identifier) @_identifier (#any-of? @_identifier 
     "def" 
@@ -43,17 +60,26 @@
     "defnp" 
     "defp"
   ))
-  (arguments (call [
-    (arguments (_) @parameter.inner . "," @_delimiter)
-    (arguments ((_) @parameter.inner) @_delimiter .) 
-  ] (#make-range! "parameter.outer" @parameter.inner @_delimiter)))
-  [
-    (do_block "do" . (_) @_do (_) @_end . "end")
-    (do_block "do" . ((_) @_do) @_end . "end")
-  ]
+  (arguments (call))
+  (do_block "do" . (_) @function.inner . "end")
+) @function.outer
+
+; multi child
+(call 
+  target: ((identifier) @_identifier (#any-of? @_identifier 
+    "def" 
+    "defmacro" 
+    "defmacrop" 
+    "defn" 
+    "defnp" 
+    "defp"
+  ))
+  (arguments (call))
+  (do_block "do" . (_) @_do (_) @_end . "end")
   (#make-range! "function.inner" @_do @_end)
 ) @function.outer
 
+; def function(), do: ....
 (call 
   target: ((identifier) @_identifier (#any-of? @_identifier 
     "def" 
@@ -63,10 +89,8 @@
     "defnp" 
     "defp"
   ))
-  (arguments (call [
-    (arguments (_) @parameter.inner . "," @_delimiter)
-    (arguments ((_) @parameter.inner) @_delimiter .) 
-  ] (#make-range! "parameter.outer" @parameter.inner @_delimiter))
+  (arguments
+    (call)
     (keywords
       (pair
         value: (_) @function.inner))