Make fuzzy history searching sliiightly better

* Don't limit to the most recent 2000 entries. fzf can handle 20k history
  entries just fine.
* Use an anchored regexp in sed to show what's being removed (the history
  timestamp)
* Reformat onto two lines

zsh/key_bindings.zsh

@@ -2,11 +2,10 @@
 bindkey -v
 
 # Fuzzy match against history, edit selected value
+# For exact match, start the query with a single quote: 'curl
 fuzzy-history() {
-  print -z $(fc -l 1 | \
-    tail -2000 | \
-    fzf --tac --reverse --no-sort | \
-    sed 's/ *[0-9]* *//')
+  selected=$(fc -l 1 | sed 's/^[0-9]* *//' | fzf --tac --reverse --no-sort)
+  print -z "$selected"
 }
 
 # Ctrl-r triggers fuzzy history search