added specific keys to avoid using file names for snippet id

Author: lispy-dobby

snippets/crystal-mode/any

@@ -1,5 +1,6 @@
 # -*- mode: snippet -*-
 # name: any? { |...| ... }
+# key: any
 # group : collections
 # --
 any? { |${e}| $0 }

snippets/crystal-mode/case

@@ -1,5 +1,6 @@
 # -*- mode: snippet -*-
 # name: case ... end
+# key: case
 # group : general
 # --
 case ${1:object}

snippets/crystal-mode/cls

@@ -1,5 +1,6 @@
 # -*- mode: snippet -*-
 # name: class ... end
+# key: cls
 # group : definitions
 # --
 class ${1:`(let ((fn (capitalize (file-name-nondirectory

snippets/crystal-mode/def

@@ -1,6 +1,7 @@
 # -*- mode: snippet -*-
 # name: def ... end
 # key: def
+# key: def
 # --
 def ${1:method}${2:(${3:args})}
     $0

snippets/crystal-mode/ea

@@ -1,5 +1,6 @@
 # -*- mode: snippet -*-
 # name: each { |...| ... }
+# key: ea
 # group : collections
 # --
 each { |${e}| $0 }

snippets/crystal-mode/eac

@@ -1,5 +1,6 @@
 # -*- mode: snippet -*-
 # name: each_cons(...) { |...| ... }
+# key: eac
 # group : collections
 # --
 each_cons(${1:2}) { |${group}| $0 }

snippets/crystal-mode/eai

@@ -1,5 +1,6 @@
 # -*- mode: snippet -*-
 # name: each_index { |i| ... }
+# key: eai
 # group : collections
 # --
 each_index { |${i}| $0 }

snippets/crystal-mode/eawi

@@ -1,5 +1,6 @@
 # -*- mode: snippet -*-
 # name: each_with_index { |e, i| ... }
+# key: eawi
 # group : collections
 # --
 each_with_index { |${e}, ${i}| $0 }

snippets/crystal-mode/el

@@ -1,5 +1,6 @@
 # -*- mode: snippet -*-
 # name: else ...
+# key: el
 # group : control structure
 # --
 else`(indent-for-tab-command)`

snippets/crystal-mode/esi

@@ -1,5 +1,6 @@
 # -*- mode: snippet -*-
 # name: elsif ...
+# key: esi
 # group : control structure
 # --
 elsif`(indent-for-tab-command)` ${1:condition}