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

snippets/f90-mode/au

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : automatic
+# key: au
 # --
 automatic $0 

snippets/f90-mode/bd

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : block data
+# key: bd
 # --
 block data $0

snippets/f90-mode/c

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : continue
+# key: c
 # --
 continue $0

snippets/f90-mode/ch

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : character
+# key: ch
 # --
 character $0

snippets/f90-mode/cx

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : complex
+# key: cx
 # --
 complex $0

snippets/f90-mode/dc

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : double complex
+# key: dc
 # --
 double complex $0

snippets/f90-mode/do

@@ -1,5 +1,6 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : do while (...) end do
+# key: do
 # --
 do while (${1:condition})
    $0

snippets/f90-mode/dp

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : double precision
+# key: dp
 # --
 double precision $0

snippets/f90-mode/eq

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : equivalence
+# key: eq
 # --
 equivalence $0

snippets/f90-mode/ib

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : implicit byte
+# key: ib
 # --
 implicit byte $0

snippets/f90-mode/ic

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : implicit complex
+# key: ic
 # --
 implicit complex $0

snippets/f90-mode/ich

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : implicit character
+# key: ich
 # --
 implicit character $0

snippets/f90-mode/if

@@ -1,5 +1,6 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : if then end if
+# key: f90-modeif
 # --
 if ( ${1:condition} ) then
    $0

snippets/f90-mode/ii

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : implicit integer 
+# key: ii
 # --
 implicit integer $0

snippets/f90-mode/il

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : implicit logical
+# key: il
 # --
 implicit logical $0

snippets/f90-mode/in

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : implicit none
+# key: in
 # --
 implicit none

snippets/f90-mode/inc

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : include
+# key: inc
 # --
 include $0

snippets/f90-mode/intr

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : intrinsic
+# key: intr
 # --
 intrinsic $0

snippets/f90-mode/ir

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : implicit real
+# key: ir
 # --
 implicit real $0

snippets/f90-mode/l

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : logical
+# key: l
 # --
 logical $0

snippets/f90-mode/pa

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : parameter
+# key: pa
 # --
 parameter $0

snippets/f90-mode/pr

@@ -1,5 +1,6 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : program ... end program ...
+# key: pr
 # --
 program ${1:name}
   $0

snippets/f90-mode/re

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : read (*,*)
+# key: re
 # --
 read (${1:*},${2:*}) $0

snippets/f90-mode/st

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : structure
+# key: st
 # --
 structure $0

snippets/f90-mode/su

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : subroutine
+# key: su
 # --
 subroutine $0

snippets/f90-mode/wr

@@ -1,4 +1,5 @@
 #contributor: Li Zhu <http://www.zhuli.name>
 #name : write (*,*)
+# key: wr
 # --
 write (${1:*},${2:*}) $0