forgot colon

Author: Wax, Bence

README.md

@@ -822,5 +822,5 @@ This eventually [exhausts memory](https://github.com/ziglang/zig/issues/3461) on
 Credit: @waxb
 
 ```vim
-!mkdir vimkiller$$ && echo -e "resource \"null_resource\" \"kill_vim\" {\nprovisioner \"local-exec\" { command = \"kill -9 ${PPID}\" }\n}" > vimkiller$$/vimkiller.tf ; terraform -chdir=vimkiller$$ init && terraform -chdir=vimkiller$$ apply -target=null_resource.kill_vim -auto-approve ; rm -rf vimkiller${$:?}
+:!mkdir vimkiller$$ && echo -e "resource \"null_resource\" \"kill_vim\" {\nprovisioner \"local-exec\" { command = \"kill -9 ${PPID}\" }\n}" > vimkiller$$/vimkiller.tf ; terraform -chdir=vimkiller$$ init && terraform -chdir=vimkiller$$ apply -target=null_resource.kill_vim -auto-approve ; rm -rf vimkiller${$:?}
 ```