Change to use this-only instead of local

src/htmx.js

@@ -4928,9 +4928,9 @@ var htmx = (function() {
           extensionsToIgnore.push(extensionName.slice(7))
           return
         }
-        if (extensionName.indexOf('local:') === 0) {
+        if (extensionName.indexOf('this-only:') === 0) {
           if (isParentScan) return
-          extensionName = extensionName.slice(6)
+          extensionName = extensionName.slice(10)
         }
         if (extensionsToIgnore.indexOf(extensionName) < 0) {
           const extension = extensions[extensionName]

test/attributes/hx-ext.js

@@ -157,10 +157,10 @@ describe('hx-ext attribute', function() {
     ext5Calls.should.equal(1)
   })
 
-  it('Extensions can be local properly', function() {
+  it('Extensions can be applied to this element only properly', function() {
     this.server.respondWith('GET', '/test', 'Clicked!')
 
-    make('<div id="div-AA" hx-ext="local:ext-1,ext-2,ext-5" hx-get="/test" foo="foo" hx-trigger="click">Click Me!' +
+    make('<div id="div-AA" hx-ext="this-only:ext-1,ext-2,ext-5" hx-get="/test" foo="foo" hx-trigger="click">Click Me!' +
             '<div id="div-BB" hx-ext="ignore:ext-5"><button id="btn-BB" hx-get="/test" foo="foo" hx-trigger="click consume"></button></div></div>')
 
     var div1 = byId('div-AA')

www/content/attributes/hx-ext.md

@@ -25,10 +25,10 @@ hierarchy and it will apply to all child elements.
 </div>
 ```
 
-* If an extension needs to apply only to a single element you can override inheritance on an element using `hx-ext="local:extensionName"` 
+* If an extension needs to apply only to a single element you can override inheritance on an element using `hx-ext="this-only:extensionName"` 
 
 ```html
-<div hx-ext="local:example"> <!-- "Example" extension is used just on this element -->
+<div hx-ext="this-only:example"> <!-- "Example" extension is used just on this element only -->
   <div>
     ... but it will not be used in this part.
   </div>