Return Of The Regex

[ysf]

Fixing regex match if packagename is inside a word.

• Changed regexes to a whitelist approach
• Closes: Anywhere package name appears becomes a link  #131

[anthraxx]

This approach introduces a regression on word boundary ends inside logical elements like a link:

package = CVEGroupPackage()
package.pkgname = "sdl2"
advisory_extend_html("yay\nfoo\nhttps://discourse.libsdl.org/t/vulnerabilities-found-in-libsdl-1-2-15-and-sdl2\n", [], package)
Out[27]: 'https://discourse.libsdl.org/t/vulnerabilities-found-in-libsdl-1-2-15-and-<a href="/package/sdl2" rel="noopener">sdl2</a>\n'

additional this doesn't work for packages with nothing on the left side:

package = CVEGroupPackage()
package.pkgname = "cargo-audit"
advisory_extend_html("cargo-audit is affected\n", [], package)
Out[15]: 'cargo-audit is affected\n'

Can you add some unit test for this function with some use cases that should be covered?