Merge pull request #1416 from mistydemeo/do_not_trim_deprecated_syntax_lines

Doc parser: don't strip comment leader twice

Author: technicalpickles

src/robot.js

@@ -524,7 +524,7 @@ class Robot {
     const body = fs.readFileSync(require.resolve(path), 'utf-8')
 
     const useStrictHeaderRegex = /^["']use strict['"];?\s+/
-    const lines = body.replace(useStrictHeaderRegex, '').split('\n')
+    const lines = body.replace(useStrictHeaderRegex, '').split(/(?:\n|\r\n|\r)/)
       .reduce(toHeaderCommentBlock, {lines: [], isHeader: true}).lines
       .filter(Boolean) // remove empty lines
     let currentSection = null