Re-implement greph as a .bashrc function

dotfiles/bash/main.bashrc

@@ -26,6 +26,10 @@ grepr() {
     grep --color -n --exclude-dir=".git" -e "$p" -r "$@"
 }
 
+greph() {
+    <"$HOME/.bash_history" grep "$@"
+}
+
 gitcd() {
     cd "$(git rev-parse --show-toplevel)"
 }