fix(markdown): handle additional spaces before `code` (#3180)

* fix(markdown): handle additional spaces before `code`

* test: update snapshots

* fix: ignore leading `\n` from indented `code`

* docs: add comment

src/printer-markdown.js

@@ -158,7 +158,15 @@ function genericPrint(path, options, print) {
         printChildren(path, options, print)
       ]);
     case "code": {
-      if (/\s/.test(options.originalText[node.position.start.offset])) {
+      if (
+        // the first char may point to `\n`, e.g. `\n\t\tbar`, just ignore it
+        /^\n?( {4,}|\t)/.test(
+          options.originalText.slice(
+            node.position.start.offset,
+            node.position.end.offset
+          )
+        )
+      ) {
         // indented code block
         return align(
           4,

tests/markdown_code/__snapshots__/jsfmt.spec.js.snap

@@ -1,5 +1,56 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`additional-space.md 1`] = `
+1. Fork the repo and create your branch from \`master\`.
+
+   Open terminal (e.g. Terminal, iTerm, Git Bash or Git Shell) and type:
+   \`\`\`sh
+   git clone https://github.com/<your_username>/jest
+   cd jest
+   git checkout -b my_branch
+   \`\`\`
+   Note:
+   Replace \`<your_username>\` with your GitHub username
+
+3. Run \`yarn install\`.
+   On Windows:
+   To install [Yarn](https://yarnpkg.com/en/docs/install#windows-tab) on Windows you may need to download either node.js or Chocolatey<br />
+
+    \`\`\`sh
+    yarn install
+    \`\`\`
+    To check your version of Yarn and ensure it's installed you can type:
+    \`\`\`sh
+    yarn --version
+    \`\`\`~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+1. Fork the repo and create your branch from \`master\`.
+
+   Open terminal (e.g. Terminal, iTerm, Git Bash or Git Shell) and type:
+
+   \`\`\`sh
+   git clone https://github.com/<your_username>/jest
+   cd jest
+   git checkout -b my_branch
+   \`\`\`
+
+   Note: Replace \`<your_username>\` with your GitHub username
+
+2. Run \`yarn install\`. On Windows: To install
+   [Yarn](https://yarnpkg.com/en/docs/install#windows-tab) on Windows you may
+   need to download either node.js or Chocolatey<br />
+
+   \`\`\`sh
+   yarn install
+   \`\`\`
+
+   To check your version of Yarn and ensure it's installed you can type:
+
+   \`\`\`sh
+   yarn --version
+   \`\`\`
+
+`;
+
 exports[`backtick.md 1`] = `
 \`\`\`\`\`\`\`\`\`\`
 

tests/markdown_code/additional-space.md

@@ -0,0 +1,22 @@
+1. Fork the repo and create your branch from `master`.
+
+   Open terminal (e.g. Terminal, iTerm, Git Bash or Git Shell) and type:
+   ```sh
+   git clone https://github.com/<your_username>/jest
+   cd jest
+   git checkout -b my_branch
+   ```
+   Note:
+   Replace `<your_username>` with your GitHub username
+
+3. Run `yarn install`.
+   On Windows:
+   To install [Yarn](https://yarnpkg.com/en/docs/install#windows-tab) on Windows you may need to download either node.js or Chocolatey<br />
+
+    ```sh
+    yarn install
+    ```
+    To check your version of Yarn and ensure it's installed you can type:
+    ```sh
+    yarn --version
+    ```

tests/markdown_spec/__snapshots__/jsfmt.spec.js.snap

@@ -1049,8 +1049,10 @@ exports[`example-98.md 1`] = `
 aaa
 \`\`\`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-    aaa
-    aaa
+\`\`\`
+aaa
+aaa
+\`\`\`
 
 `;
 
@@ -1061,9 +1063,11 @@ aaa
 aaa
   \`\`\`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-    aaa
-    aaa
-    aaa
+\`\`\`
+aaa
+aaa
+aaa
+\`\`\`
 
 `;
 
@@ -1074,9 +1078,11 @@ exports[`example-100.md 1`] = `
   aaa
    \`\`\`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-    aaa
-     aaa
-    aaa
+\`\`\`
+aaa
+ aaa
+aaa
+\`\`\`
 
 `;
 
@@ -1107,7 +1113,9 @@ exports[`example-103.md 1`] = `
 aaa
   \`\`\`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-    aaa
+\`\`\`
+aaa
+\`\`\`
 
 `;
 
@@ -2537,14 +2545,16 @@ bar
 
 bar
 
-    - baz
+\`\`\`\`
+- baz
 
-    + \`\`\`
-      foo
++ \`\`\`
+  foo
 
 
-      bar
-      \`\`\`
+  bar
+  \`\`\`
+\`\`\`\`
 
 `;