keyboard shortcut for markdown comment

SQUASHED: AUTO-COMMIT-src-components-widgets-ast-capabilities.js,AUTO-COMMIT-src-components-widgets-lively-code-mirror.js,Merge-branch-gh-pages-of-https-github.com-LivelyKernel-lively4-core-into-gh-pages,updated-tip-of-the-day,

Author: onsetsu

src/components/widgets/ast-capabilities.js

@@ -397,6 +397,20 @@ export default class ASTCapabilities {
     this.scrollTo(scrollInfo);
   }
 
+  insertMarkdownComment() {
+    const { livelyCodeMirror: lcm, codeMirror: cm } = this.codeProvider;
+
+    const before = '/*MD ## ';
+    const around = 'your text';
+    const after = ' MD*/';
+    const l4url = 'lively4url';
+    const l4urlplus = l4url + ' + ';
+
+    const selections = cm.getSelections();
+    cm.replaceSelections(selections.fill(before));
+    cm.replaceSelections(selections.fill(after), "start");
+    cm.replaceSelections(selections.fill(around), "around");
+  }
   braveNewWorld() {
     const { livelyCodeMirror: lcm, codeMirror: cm } = this.codeProvider;
 

src/components/widgets/lively-code-mirror.js

@@ -372,6 +372,9 @@ export default class LivelyCodeMirror extends HTMLElement {
         "Ctrl-Alt-G Ctrl-Alt-I": cm => this.astCapabilities(cm).then(ac => ac.generateIf('then')),
         "Shift-Alt-G Alt-I": cm => this.astCapabilities(cm).then(ac => ac.generateIf('else')),
 
+        // #KeyboardShortcut Alt-/ insert markdown comment
+        "Alt-/": cm => this.astCapabilities(cm).then(ac => ac.insertMarkdownComment('condition')),
+        
         // #KeyboardShortcut Alt-M ast refactoring/autocomplete menu
         "Alt-M": cm => {
           if(this.isJavaScript){

src/components/widgets/lively-code-tip.js

@@ -24,7 +24,7 @@ export default class CodeTip extends Morph {
     }
 
     this.tips = [
-      "With 'Alt-Enter' you can access a powerful refactoring menu.",
+      "With 'Alt-M' you can access a powerful refactoring menu.",
       "Press 'Next Tip' to get more advice!",
       "You can get a global context menu by clicking on the background or anywhere there is  not a local context menu.",
       "Make your code simpler to understand with the extract method feature 'Alt+M'.",