File Location of Vulnerability shows colon after file if no line number exists

Summary

The file location of the vulnerability should not show the colon at the end of the file name if there is no line number associated with the vulnerability.

Steps to reproduce

Go to https://gitlab.com/jschafer/webgoat/-/security/vulnerabilities/759668 and see the Location section

Example Project

https://gitlab.com/jschafer/webgoat/-/security/vulnerabilities/759668

What is the current bug behavior?

The file location of the vulnerability shows the colon at the end of the file name even though there is no line number associated with the vulnerability.

What is the expected correct behavior?

The file location of the vulnerability should not show the colon at the end of the file name if there is no line number associated with the vulnerability.!

Relevant logs and/or screenshots

Screen_Shot_2020-04-15_at_11.49.51_AM

Possible fixes

Fix string at https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/app/helpers/vulnerabilities_helper.rb#L49