Changed var to let and == to === and != to !==

packages/codemirror/src/editor.ts

@@ -1361,34 +1361,34 @@ namespace Private {
    */
   export function delSpaceToPrevTabStop(cm: CodeMirror.Editor): void {
     let doc = cm.getDoc();
-    var tabSize = cm.getOption('indentUnit');
-    var ranges = doc.listSelections(); // handle multicursor
-    for (var i = ranges.length - 1; i >= 0; i--) {
+    let tabSize = cm.getOption('indentUnit');
+    let ranges = doc.listSelections(); // handle multicursor
+    for (let i = ranges.length - 1; i >= 0; i--) {
       // iterate reverse so any deletions don't overlap
-      var head = ranges[i].head;
-      var anchor = ranges[i].anchor;
-      var isSelection = !posEq(head, anchor);
+      let head = ranges[i].head;
+      let anchor = ranges[i].anchor;
+      let isSelection = !posEq(head, anchor);
       if (isSelection) {
         doc.replaceRange('', anchor, head);
       } else {
-        var line = doc.getLine(head.line).substring(0, head.ch);
+        let line = doc.getLine(head.line).substring(0, head.ch);
         if (line.match(/^\ +$/) !== null) {
           // delete tabs
-          var prevTabStop = (Math.ceil(head.ch / tabSize) - 1) * tabSize;
-          var from = CodeMirror.Pos(head.line, prevTabStop);
+          let prevTabStop = (Math.ceil(head.ch / tabSize) - 1) * tabSize;
+          let from = CodeMirror.Pos(head.line, prevTabStop);
           doc.replaceRange('', from, head);
         } else {
           // delete non-tabs
-          if (head.ch == 0) {
-            if (head.line != 0) {
-              var from = CodeMirror.Pos(
+          if (head.ch === 0) {
+            if (head.line !== 0) {
+              let from = CodeMirror.Pos(
                 head.line - 1,
                 doc.getLine(head.line - 1).length
               );
               doc.replaceRange('', from, head);
             }
           } else {
-            var from = CodeMirror.Pos(head.line, head.ch - 1);
+            let from = CodeMirror.Pos(head.line, head.ch - 1);
             doc.replaceRange('', from, head);
           }
         }