PIE update

Author: easycoder

pie/pie/5 Plugins/Handling plugins.txt

@@ -39,7 +39,7 @@ For this we need 2 keywords: `require` and `run`, plus a `module` variable type
 ```
 Note that the final `return 0` causes program execution to halt while the load is happening. The `program.run(command.pc + 1)` in the callback function resumes execution once the load has completed.
 
-The `program.require() function used by `run(program)` looks like this:
+The `program.require()` function used by `run(program)` looks like this:
 ```
 	require: function(type, src, callback) {
 		let prefix = ``;