Bug to convert title with number format

In file: gitdown/src/gitdown.js
Line 308 to 314

Source code:
===
// `test`
normalizedName = _.trim(marked(normalizedName));

//

test

normalizedName = normalizedName.slice(3, -4);

// test
===

The conversion is incorrect if the title like this: 1. Title one
Raw markdown: ## 1. Title one
Expected raw output: ## 1.Title one
Expected user view: 1. Title one

Actual error result:
===
// `1. Title one`
normalizedName = _.trim(marked(normalizedName));

//

\n
1. 1. Title one
\n

normalizedName = normalizedName.slice(3, -4);

// >\n

Title one

\n<
===