Fix some typos in dumpReactTree.js (facebook#19636)

Summary:
Simple doc fixes
Closes facebook#19636

Differential Revision: D8344481

Pulled By: TheSavior

fbshipit-source-id: b6fa064f70793bdaf1d6346b2775373b74c2ae3b

Libraries/BugReporting/dumpReactTree.js

@@ -51,14 +51,14 @@ function getReactTree() {
 }
 
 /*
-function dumpNode(node: Object, identation: number) {
+function dumpNode(node: Object, indentation: number) {
   const data = getReactData(node);
   if (data.nodeType === 'Text') {
-    return indent(identation) + data.text + '\n';
+    return indent(indentation) + data.text + '\n';
   } else if (data.nodeType === 'Empty') {
     return '';
   }
-  let output = indent(identation) + `<${data.name}`;
+  let output = indent(indentation) + `<${data.name}`;
   if (data.nodeType === 'Composite') {
     for (const propName of Object.getOwnPropertyNames(data.props || {})) {
       if (isNormalProp(propName)) {
@@ -76,11 +76,11 @@ function dumpNode(node: Object, identation: number) {
   }
   let childOutput = '';
   for (const child of data.children || []) {
-    childOutput += dumpNode(child, identation + 1);
+    childOutput += dumpNode(child, indentation + 1);
   }
 
   if (childOutput) {
-    output += '>\n' + childOutput + indent(identation) + `</${data.name}>\n`;
+    output += '>\n' + childOutput + indent(indentation) + `</${data.name}>\n`;
   } else {
     output += ' />\n';
   }