Add new test

Add test for non-string input to sub normalize-string

v2.1.0

• remove the sub strip-comment check and fail lines with only the
  comment char at the beginning of the line and no other content
• modify tests to check the new behavior

API 2

Update to API version 2

• Add better signature for routine strip-comment
• Deprecate old signature for routine strip-comment
• Make strip-comment more robust by handling multi-character comment characters
• Improve tests, test for tabs in input strings (added in v2.0.1)
• Note version 2.0.0 was not released to CPAN

initial release

v1.0.0

duh, correct module name