chroma:tldr:5159b

This command involves a few variables and a series of commands being executed together. Let's break it down step by step:

1. ${command}: Represents a placeholder for an actual command or a script that produces some output.
2. |: It is a pipe symbol that redirects the output of the previous command (in this case, ${command}) to the input of the next command (chroma).
3. chroma: Refers to the chroma command-line tool, which is used for syntax highlighting.
4. --lexer ${c++}: Specifies the lexer to be used for the syntax highlighting. In this case, ${c++} is used as a placeholder for the C++ programming language, which implies that the source code treated as C++.
5. --formatter ${svg}: Specifies the formatter to be used for the output. ${svg} is used as a placeholder for the SVG (Scalable Vector Graphics) format, which means that the output will be in SVG format.
6. --style ${monokai}: Specifies the style or theme to be applied to the syntax highlighting. ${monokai} is used as a placeholder for the Monokai style.
7. > ${path-to-target_file-svg}: Redirects the output of the previous command to a file specified by ${path-to-target_file-svg}. The > symbol indicates that the output is being redirected to a file instead of the standard output (console).

Therefore, when this command is executed, it runs the command or script represented by ${command}, applies syntax highlighting using the C++ lexer, formats the output in SVG, applies the Monokai style, and saves the resulting SVG file to the path specified by ${path-to-target_file-svg}.