restructuring classic snippets dir to conform to new parenting specs

snippets/ruby-mode/collections/all

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+#name : all? { |...| ... }
+#group : collections
+# --
+all? { |${e}| $0 }

snippets/ruby-mode/collections/any

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+#name : any? { |...| ... }
+#group : collections
+# --
+any? { |${e}| $0 }

snippets/ruby-mode/collections/classify

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+#name : classify { |...| ... }
+#group : collections
+# --
+classify { |${e}| $0 }

snippets/ruby-mode/collections/collect

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+#name : collect { |...| ... }
+#group : collections
+# --
+collect { |${e}| $0 }

snippets/ruby-mode/collections/deli

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+#name : delete_if { |...| ... }
+#group : collections
+# --
+delete_if { |${e} $0 }

snippets/ruby-mode/collections/det

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+#name : detect { |...| ... }
+#group : collections
+# --
+detect { |${e}| $0 }

snippets/ruby-mode/collections/ea

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+#name : each { |...| ... }
+#group : collections
+# --
+each { |${e}| $0 }

snippets/ruby-mode/collections/eac

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+#name : each_cons(...) { |...| ... }
+#group : collections
+# --
+each_cons(${1:2}) { |${group}| $0 }

snippets/ruby-mode/collections/eai

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+#name : each_index { |i| ... }
+#group : collections
+# --
+each_index { |${i}| $0 }

snippets/ruby-mode/collections/eav

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+#name : each_value { |val| ... }
+#group : collections
+# --
+each_value { |${val}| $0 }

snippets/ruby-mode/collections/eawi

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+#name : each_with_index { |e, i| ... }
+#group : collections
+# --
+each_with_index { |${e}, ${i}| $0 }

snippets/ruby-mode/collections/inject

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+#name : inject(...) { |...| ... }
+#group : collections
+# --
+inject(${1:0}) { |${2:injection}, ${3:element}| $0 }

snippets/ruby-mode/collections/reject

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+#name : reject { |...| ... }
+#group : collections
+# --
+reject { |${1:element}| $0 }

snippets/ruby-mode/collections/select

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+#name : select { |...| ... }
+#group : collections
+# --
+select { |${1:element}| $0 }

snippets/ruby-mode/collections/zip

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+#name : zip(...) { |...| ... }
+#group : collections
+# --
+zip(${enums}) { |${row}| $0 }