Assorted wikitext fixes

editions/dev/tiddlers/new/Filter Operators.tid

@@ -33,6 +33,7 @@ Suppose we want to make a filter operator that returns every other tiddler from
 
 We make a new tiddler, set its `type` and `module-type` appropriately, and begin writing the code:
 
+```
 (function(){
 "use strict";
     
@@ -40,17 +41,19 @@ We make a new tiddler, set its `type` and `module-type` appropriately, and begin
     // TODO
 }
 })();
+```
 
 For the example filter syntax, our function will be called with
 
 * source: an iterator over all the tiddlers tagged as `interesting`
-* operator: an object {operator: "everyother", operand: ""}
+* operator: an object `{operator: "everyother", operand: ""}`
 * options: an object with the current Wiki object and a widget object, neither of which we need
 
 As is usually the case, we don't care about `operator.operator` here (since that information has already been used to look up our function); we also don't care about `operator.operand`, since there is no meaningful operand for this operation.
 
 We could implement the operator by iterating over the input tiddlers and explicitly building a result array of titles:
 
+```
 (function(){
 "use strict";
     
@@ -64,11 +67,13 @@ We could implement the operator by iterating over the input tiddlers and explici
     return result;
 }
 })();
+```
 
 That is, we supply a callback to `source` that negates `include` each time through (in order to grab every other result) and pushes the `title` of every other tiddler onto the result.
 
 Alternatively, we can return our own iterator, by returning a function that accepts a similar callback and only calls it on every other tiddler:
 
+```
 (function(){
 "use strict";
     
@@ -82,11 +87,10 @@ Alternatively, we can return our own iterator, by returning a function that acce
     };
 }
 })();
+```
 
-Either way, we could interpret the `!` flag on the filter, if present, to mean that we want the //other// half of the tiddlers, by using it to set the initial value of `include`:
+Either way, we could interpret the `!` flag on the filter, if present, to mean that we want the //other// half of the tiddlers, by using it to set the initial value of `include`: `var include = operator.prefix !== "!";`
-
-    var include = operator.prefix !== "!";
 
 ! Filter Behaviour
 
-As with [JavaScript Macros], filter operators should not make modifications to tiddlers, but only return a list of tiddlers or a tiddler iterator.
+As with [[JavaScript Macros]], filter operators should not make modifications to tiddlers, but only return a list of tiddlers or a tiddler iterator.