Fix asciidoc parsing failure for backtick in front of emdash

06_object.txt

@@ -84,7 +84,7 @@ object it was called on. For example, if there are different rabbits,
 the `speak` method must indicate which rabbit is speaking.
 
 When a function is called as a method—looked up as a property and
-immediately called, as in `object.method()`—the special variable
+immediately called, as in ++object.method()++—the special variable
 `this` in its body will point to the object that it was called on.
 
 // test: join

09_regexp.txt

@@ -822,7 +822,7 @@ console.log("Banana".match(/an/g));
 
 So be cautious with global regular expressions. The cases where they
 are necessary—calls to `replace` and places where you want to
-explicitly use `lastIndex`—are typically the only places where you
+explicitly use ++lastIndex++—are typically the only places where you
 want to use them.
 
 A common pattern is to scan through all occurrences of a pattern in a

11_language.txt

@@ -310,7 +310,7 @@ will evaluate the second. Otherwise, the third gets evaluated. Because
 result of the second or third argument.
 
 Our language differs from JavaScript in its handling of the condition
-value to `if`—it will not treat 0 or the empty string as false.
+value to ++if++—it will not treat 0 or the empty string as false.
 
 The `while` form is similar;
 

14_event.txt

@@ -713,7 +713,7 @@ if (Math.random() < .5) { // 50% chance
 ----
 
 The `cancelAnimationFrame` function works in the same way as
-`clearTimeout`—calling it on a value returned by
+++clearTimeout++—calling it on a value returned by
 `requestAnimationFrame` will cancel that frame (assuming it hasn't
 already been called).
 

15_game.txt

@@ -1223,7 +1223,7 @@ well: The `runAnimation` function, though nice and obvious, does not
 provide a clean way to pause the animation.
 
 The event handler that notices the key is best set up in
-`runLevel`—setting it up in `runAnimation` would be cheating. That is
+++runLevel++—setting it up in `runAnimation` would be cheating. That is
 supposed to be an general helper function for all kinds of animations,
 so it shouldn't handle a feature specific to this game.
 

16_canvas.txt

@@ -284,7 +284,7 @@ computed.
 
 Easier to reason about are arcs—fragments of a circle. The `arcTo`
 method method takes five arguments. The first four act somewhat like
-the arguments to `quadraticCurve`—the first two are a sort of control
+the arguments to ++quadraticCurveTo++—the first two are a sort of control
 point, and the second two are the line's destination. The fifth
 argument provides the radius of the arc. The method will conceptually
 take a corner, a line going to the control point and then the

17_http.txt

@@ -599,7 +599,7 @@ together that they make a significant difference.
 Calling `then` produces a new promise, whose result (the value passed
 to success handlers) depends on the return value of the first function
 we passed to `then`. If this function returns another promise, that
-promise is “connected” to the one returned by `then`—its success or
+promise is “connected” to the one returned by ++then++—its success or
 failure is passed on to the `then` promise. If the handler returns a
 normal, non-promise value, the output promise immediately succeeds,
 with that value as its result.

Makefile

@@ -20,5 +20,5 @@ tex/%.tex: tex/%.db
 
 test:
 	@for F in $(CHAPTERS); do echo Testing $$F:; node bin/run_tests.js $$F.txt; done
-	@! grep '[a-zA-Z]_[—“”‘’]\|[—“”‘’]_[a-zA-Z]' *.txt
+	@! grep '[a-zA-Z]_[—“”‘’]\|[—“”‘’]_[a-zA-Z]\|[a-zA-Z]`—' *.txt
 	@echo Done.