NoMethodError when repo URL does not end with ".git"

[rtweeks]

File/line references are to commit c2b85a9.

MyPrecious::Reporting#default_output_fpath (in lib/myprecious.rb, line 220) tries to use GitInfoExtractor#repo_name (also in lib/myprecious.rb, line 204), but that method returns nil unless the repository URL ends with ".git".