Add explicit "# key" directive to legacy snippet collection before deprecating filenames-as-triggers

snippets/ruby-mode/collections/all

@@ -1,3 +1,4 @@
 #name : all? { |...| ... }
+# key: collectionsall
 # --
 all? { |${e}| $0 }

snippets/ruby-mode/collections/any

@@ -1,3 +1,4 @@
 #name : any? { |...| ... }
+# key: collectionsany
 # --
 any? { |${e}| $0 }

snippets/ruby-mode/collections/classify

@@ -1,3 +1,4 @@
 #name : classify { |...| ... }
+# key: ruby-modecollectionsclassify
 # --
 classify { |${e}| $0 }

snippets/ruby-mode/collections/collect

@@ -1,3 +1,4 @@
 #name : collect { |...| ... }
+# key: collectionscollect
 # --
 collect { |${e}| $0 }

snippets/ruby-mode/collections/deli

@@ -1,3 +1,4 @@
 #name : delete_if { |...| ... }
+# key: collectionsdeli
 # --
 delete_if { |${e} $0 }

snippets/ruby-mode/collections/det

@@ -1,3 +1,4 @@
 #name : detect { |...| ... }
+# key: collectionsdet
 # --
 detect { |${e}| $0 }

snippets/ruby-mode/collections/ea

@@ -1,3 +1,4 @@
 #name : each { |...| ... }
+# key: collectionsea
 # --
 each { |${e}| $0 }

snippets/ruby-mode/collections/eac

@@ -1,3 +1,4 @@
 #name : each_cons(...) { |...| ... }
+# key: collectionseac
 # --
 each_cons(${1:2}) { |${group}| $0 }

snippets/ruby-mode/collections/eai

@@ -1,3 +1,4 @@
 #name : each_index { |i| ... }
+# key: collectionseai
 # --
 each_index { |${i}| $0 }

snippets/ruby-mode/collections/eav

@@ -1,3 +1,4 @@
 #name : each_value { |val| ... }
+# key: collectionseav
 # --
 each_value { |${val}| $0 }

snippets/ruby-mode/collections/eawi

@@ -1,3 +1,4 @@
 #name : each_with_index { |e, i| ... }
+# key: collectionseawi
 # --
 each_with_index { |${e}, ${i}| $0 }

snippets/ruby-mode/collections/inject

@@ -1,3 +1,4 @@
 #name : inject(...) { |...| ... }
+# key: collectionsinject
 # --
 inject(${1:0}) { |${2:injection}, ${3:element}| $0 }

snippets/ruby-mode/collections/reject

@@ -1,3 +1,4 @@
 #name : reject { |...| ... }
+# key: collectionsreject
 # --
 reject { |${1:element}| $0 }

snippets/ruby-mode/collections/select

@@ -1,3 +1,4 @@
 #name : select { |...| ... }
+# key: collectionsselect
 # --
 select { |${1:element}| $0 }

snippets/ruby-mode/collections/zip

@@ -1,3 +1,4 @@
 #name : zip(...) { |...| ... }
+# key: collectionszip
 # --
 zip(${enums}) { |${row}| $0 }