Elixir cleanup + 5 useful snippets (#245)

* removed trailing newline from elixir snippets

* 5 convenience snippets I often use

snippets/elixir-mode/after

@@ -0,0 +1,6 @@
+## -*- mode: snippet -*-
+# name : after
+# key: after
+# --
+after ${1:500} ->
+  $0

snippets/elixir-mode/defmodule_filename

@@ -0,0 +1,7 @@
+## -*- mode: snippet -*-
+# name : defmodule XXX end
+# key: dm
+# --
+defmodule ${1:`(concat (capitalize (file-name-nondirectory (directory-file-name (file-name-directory buffer-file-name)))) ".")`}${2:`(mapconcat 'capitalize (split-string (file-name-base) "_") "")`} do
+  $0
+end

snippets/elixir-mode/function

@@ -0,0 +1,7 @@
+## -*- mode: snippet -*-
+# name : function
+# key: dfun
+# --
+def $1($2)${3:$$(when (and yas-moving-away-p yas-modified-p) (concat " when " yas-text))} do
+    $0
+end

snippets/elixir-mode/function-one-line

@@ -0,0 +1,5 @@
+## -*- mode: snippet -*-
+# name : function-one-line
+# key: df
+# --
+def $1($2)${3:$$(when (and yas-moving-away-p yas-modified-p) (concat " when " yas-text))}, do: $0

snippets/elixir-mode/receive

@@ -0,0 +1,7 @@
+## -*- mode: snippet -*-
+# name : receive
+# key: rcv
+# --
+receive do
+  $0
+end