Fix yas bash snippets

emacs/snippets/sh-mode/bang

@@ -1,6 +1,6 @@
 # -*- mode: snippet -*-
-# name: bang
+# name: shebang
 # key: !
 # --
 #!/usr/bin/env bash
-$0
+$0

emacs/snippets/sh-mode/sdir

@@ -1,6 +1,6 @@
 # -*- mode: snippet -*-
-# name: the currently executing/sourced script's directory
-# key: script-dir
+# name: current script's directory
+# key: sdir
 # --
 # See https://stackoverflow.com/a/246128/3561275
 SOURCE="\${BASH_SOURCE[0]}"
@@ -11,4 +11,4 @@ while [ -h "\$SOURCE" ]; do # resolve \$SOURCE until the file is no longer a sym
 done
 DIR="\$( cd -P "\$( dirname "\$SOURCE" )" >/dev/null 2>&1 && pwd )"
 
-$0
+$0