single backticks are allowed inside multi-backtick inline code

Author: quantizor

.changeset/nine-owls-brush.md

@@ -0,0 +1,5 @@
+---
+'markdown-to-jsx': patch
+---
+
+Better handle exotic backtick scenarios for inline code blocks.

index.compiler.spec.tsx

@@ -4027,6 +4027,16 @@ describe('inline code blocks', () => {
       </code>
     `)
   })
+
+  it('naked backticks can be used unescaped if there are two or more outer backticks', () => {
+    render(compiler('``hi `foo` there``'))
+
+    expect(root.innerHTML).toMatchInlineSnapshot(`
+      <code>
+        hi \`foo\` there
+      </code>
+    `)
+  })
 })
 
 describe('footnotes', () => {

index.tsx

@@ -190,7 +190,7 @@ const BREAK_THEMATIC_R = /^(?:( *[-*_])){3,} *(?:\n *)+\n/
 const CODE_BLOCK_FENCED_R =
   /^(?: {1,3})?(`{3,}|~{3,}) *(\S+)? *([^\n]*?)?\n([\s\S]*?)(?:\1\n?|$)/
 const CODE_BLOCK_R = /^(?: {4}[^\n]+\n*)+(?:\n *)+\n?/
-const CODE_INLINE_R = /^(`+)((?:\\`|[^`])+)\1/
+const CODE_INLINE_R = /^(`+)((?:\\`|(?!\1)`|[^`])+)\1/
 const CONSECUTIVE_NEWLINE_R = /^(?:\n *)*\n/
 const CR_NEWLINE_R = /\r\n?/g