[fish] Use consistent function names for key bindings (#546)

- fzf-file-widget
- fzf-history-widget
- fzf-cd-widget

shell/key-bindings.fish

@@ -13,7 +13,7 @@ function fzf_key_bindings
     end
   end
 
-  function __fzf_ctrl_t
+  function fzf-file-widget
     set -q FZF_CTRL_T_COMMAND; or set -l FZF_CTRL_T_COMMAND "
     command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
       -o -type f -print \
@@ -25,14 +25,14 @@ function fzf_key_bindings
     rm -f $TMPDIR/fzf.result
   end
 
-  function __fzf_ctrl_r
+  function fzf-history-widget
     history | eval (__fzfcmd) +s +m --tiebreak=index --toggle-sort=ctrl-r $FZF_CTRL_R_OPTS > $TMPDIR/fzf.result
     and commandline (cat $TMPDIR/fzf.result)
     commandline -f repaint
     rm -f $TMPDIR/fzf.result
   end
 
-  function __fzf_alt_c
+  function fzf-cd-widget
     set -q FZF_ALT_C_COMMAND; or set -l FZF_ALT_C_COMMAND "
     command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
       -o -type d -print 2> /dev/null | sed 1d | cut -b3-"
@@ -58,14 +58,14 @@ function fzf_key_bindings
     end
   end
 
-  bind \ct '__fzf_ctrl_t'
-  bind \cr '__fzf_ctrl_r'
-  bind \ec '__fzf_alt_c'
+  bind \ct fzf-file-widget
+  bind \cr fzf-history-widget
+  bind \ec fzf-cd-widget
 
   if bind -M insert > /dev/null 2>&1
-    bind -M insert \ct '__fzf_ctrl_t'
-    bind -M insert \cr '__fzf_ctrl_r'
-    bind -M insert \ec '__fzf_alt_c'
+    bind -M insert \ct fzf-file-widget
+    bind -M insert \cr fzf-history-widget
+    bind -M insert \ec fzf-cd-widget
   end
 end