Fixed minor typos and misleading instructions

docs/documentation/docs/controls/MonacoEditor.md

@@ -1,6 +1,6 @@
 # Monaco Editor control
 
-This control is a implementatiopn of Monaco Editor.
+This control is an implementation of the Monaco Editor. The Monaco Editor is the code editor that powers [VS Code](https://github.com/microsoft/vscode). 
 
 Here is an example of the control:
 
@@ -30,22 +30,33 @@ import { MonacoEditor } from "@pnp/spfx-controls-react/lib/MonacoEditor";
 ```
 
 - The `onValueChange` change event returns the upadated code and array with messages of errors on validation and can be implemented as follows:
-  **this validation is done only to JSON language
+
+> This validation is only available for JSON language
+
+Your `onValueChange` handler would follow a similar format to this:
+
+
+```TypeScript
+   const onValueChange = (newValue: string, validationErrors: string[]): void => { console.log(newValue); };
+```
+
+Or, if using React Hooks:
 
 ```TypeScript
   const onValueChange = React.useCallback((newValue: string, validationErrors: string[]): void => {console.log(newValue);} , []);
 ```
 
+
 ## Implementation
 
 The `MonacoEditor` control can be configured with the following properties:
 
 | Property | Type | Required | Description |
 | ---- | ---- | ---- | ---- |
 | value | string   | yes | default content for editor |
-| theme | string | no | theme used by editor , two themes are supported 'vs'  and 'vs-dark', default 'vs' |
-| readOnly | boolean | no | indecate if editor is in read only mode |
-| showLineNumbers | boolean | no | editor show linenumber or not, default : yes|
+| theme | string | no | theme used by editor, two themes are supported 'vs'  and 'vs-dark', default 'vs' |
+| readOnly | boolean | no | indicate if editor is in read-only mode |
+| showLineNumbers | boolean | no | editor show line number or not, default : yes|
 | onValueChange |(newValue:string, validationErrors:string[]) => void | no | function to get code changes, return an array with validation error in case of language is 'JSON' |
 | language |string | yes | editor code language, please see https://microsoft.github.io/monaco-editor/index.html for supported languages|
 | jsonDiagnosticsOptions |monaco.languages.json.DiagnosticsOptions | no | define options to JSON validation, please see  https://microsoft.github.io/monaco-editor/index.html for more details |