mh_lint:tldr:e7e40

This command is using the mh_lint tool with the --octave option to perform linting or code analysis on a specific file.

• mh_lint: This is the name of the command or tool that is being executed.
• --octave: This is an option or flag provided to the mh_lint tool, indicating that it should analyze the file as Octave code.
• ${filename-m}: This is a shell parameter expansion syntax, and its purpose here is to provide the filename to be analyzed by the mh_lint tool. The variable $filename is substituted in its place, and if the variable is not set, it defaults to the string m.

Therefore, this command is basically running the mh_lint tool with the --octave option to analyze a file specified by the value of the $filename variable, or if the variable is not set, it analyzes a file with the name m.