Readme update and small npm package fix

Author: darkriszty

README.md

@@ -29,7 +29,7 @@ A VSCode command called `Prettify markdown tables` is also available to format t
 ### Configurable settings:
 - The maximum texth length of a selection/entire document to consider for formatting. Default: 1M chars (limit does not apply from CLI or NPM).
 - Additional languages to support formatting for besides `markdown`. See possible configurable values [here](https://code.visualstudio.com/docs/languages/identifiers#_known-language-identifiers). Default: `[ ]`.
-- Column spacing to make the columns more spaced out from each other. Default: `0` (no extra spacing).
+- Column padding to make the columns more spaced out from each other. Default: `0` (no extra spacing/padding).
 - Keyboard shortcut to prettify the currently opened markdown document. Default: <kbd>CTRL</kbd>+<kbd>ALT</kbd>+<kbd>M</kbd> (<kbd>CMD</kbd>+<kbd>ALT</kbd>+<kbd>M</kbd> on Mac).
 
 ## NPM
@@ -47,12 +47,23 @@ console.log(CliPrettify.prettify(
 `hello|world
 -|-
 foo|bar`));
-
 /* Output:
 hello | world
 ------|------
 foo   | bar
 */
+
+// specifying a column padding
+console.log(CliPrettify.prettify(
+`hello|world
+-|-
+foo|bar`, { columnPadding: 1 }));
+/* Output:
+ hello  |  world
+ ------ | ------
+ foo    |  bar
+*/
+
 ```
 
 ## Docker & CLI
@@ -61,26 +72,26 @@ The core formatting logic is available as a node docker image: `docker pull dark
 
 Formatting files or checking if they're already formatted is also possible from the command line without docker. This requires `node` and `npm` (optionally also `npx`).
 
-| Feature                              | Docker                                                                        | CLI                                                         |
-|--------------------------------------|-------------------------------------------------------------------------------|-------------------------------------------------------------|
-| Prettify a file                      | `docker container run -i darkriszty/prettify-md < input.md`                   | `npm run --silent prettify-md < input.md`                   |
-| Prettify a file and save the output  | `docker container run -i darkriszty/prettify-md < input.md > output.md`       | `npm run --silent prettify-md < input.md > output.md`       |
-| * Check whether a file is prettyfied | `docker container run -i darkriszty/prettify-md --check < input.md`           | `npm run --silent check-md < input.md`                      |
-| Use `1` extra space between columns  | `docker container run -i darkriszty/prettify-md --columnPadding=1 < input.md` | `npm run --silent prettify-md -- --columnPadding=1 < input.md` |
+| Feature                               | Docker                                                                        | CLI                                                            |
+|---------------------------------------|-------------------------------------------------------------------------------|----------------------------------------------------------------|
+| Prettify a file                       | `docker container run -i darkriszty/prettify-md < input.md`                   | `npm run --silent prettify-md < input.md`                      |
+| Prettify a file and save the output   | `docker container run -i darkriszty/prettify-md < input.md > output.md`       | `npm run --silent prettify-md < input.md > output.md`          |
+| Check whether a file is pretty or not | `docker container run -i darkriszty/prettify-md --check < input.md`           | `npm run --silent check-md < input.md`                         |
+| Use `1` as column padding             | `docker container run -i darkriszty/prettify-md --columnPadding=1 < input.md` | `npm run --silent prettify-md -- --columnPadding=1 < input.md` |
 
-> \* : the check will fail with an exception and return code `1` if the file is not prettyfied.
-> 
-> Note: the `--silent` switch sets the NPM log level to silent, which is useful to hide the executed file name and concentrate on the actual output.
-> Note: the `--` after the npm run script part is needed for npm to forward the arguments (for instance `--columnPadding=1`) to the actual script.
+> Notes:
+> * The prettify check (`--check` or `check-md`) will fail with an exception and return code `1` if the file is not prettyfied.
+> * The `--silent` switch sets the NPM log level to silent, which is useful to hide the executed file name and concentrate on the actual output.
+> * The `--` after the npm run script part is needed for npm to forward the arguments (for instance `--columnPadding=1`) to the actual prettyfier script.
+> * Optionally, use `npx` to prettify files: `npx markdown-table-prettify < input.md` instead of `npm run --silent prettify-md < input.md`.
 
 ### Installation
 
-To access the CLI, the extension can either be used from the Github sources, from the already instaledl VSCode extension or from NPM.
+To access the CLI, the extension can either be used from the Github sources, from the already installed VSCode extension or from NPM.
 
 #### Compiling from the source code
 
-- Download the source code.
-- Go to the extension directory.
+- Clone or download the source code.
 - Run `npm install`.
 - Run `npm run compile`.
 
@@ -93,7 +104,7 @@ Locate the installed extension path. The typical location of the installed exten
 
 #### Getting it from NPM
 
-Install the NPM package `npm install -g markdown-table-prettify`. Optionally, use `npx` to prettify files: `npx markdown-table-prettify < input.md` (instead of `npm run --silent prettify-md < input.md`).
+Install the NPM package `npm install -g markdown-table-prettify`. 
 
 ## Known Issues
 

cli/cliPrettify.ts

@@ -48,7 +48,7 @@ export class CliPrettify {
                     new ContentPadCalculator(new PadCalculatorSelector(), " "),
                     new AlignmentMarkerStrategy(":")
                 )),
-                new TableStringWriter(new ValuePaddingProvider(options.columnPadding)),
+                new TableStringWriter(new ValuePaddingProvider(options?.columnPadding ?? 0)),
                 [ logger ],
                 new NoSizeLimitChecker()
             ),