Writing a New Test Case with Mixed Emphasis and Strong Blocks

I noticed in my testing that this scenario failed. My first step into finding a fix is to find a test case to break the current RegEx.
Updating Strong and Emphasis RegEx Strings to be More Robust

These changes allow them to work in harmony together.
Renaming Incorrectly Named Vairables in TSMarkdownParser#addEmphasisParsingWithFormattingBlock: