vim:tldr:508fc

This command is used in a text editor or command line interface to perform a search and replace operation on a file. Here is the breakdown of the command:

• %: This specifies that the search and replace operation should be performed on the entire file.
• s: This is the command to perform the search and replace operation.
• ${regular_expression}: This is the regular expression pattern to be searched for in the file. Regular expressions are a sequence of characters that specify a search pattern. For example, if you want to find all occurrences of the word "apple", you would replace ${regular_expression} with apple.
• ${replacement}: This is the text that will replace the matched patterns found by the regular expression. For example, if you want to replace "apple" with "orange", you would replace ${replacement} with orange.
• g: This flag indicates that the search and replace operation should be performed globally, meaning that all occurrences of the regular expression pattern should be replaced. If you omit the g flag, only the first occurrence on each line will be replaced.
• <Enter>: This is the symbol for the Enter/Return key on your keyboard. Pressing Enter will execute the command and perform the search and replace operation.

In summary, this command is used to search for a regular expression pattern in a file and replace it with a specified text globally.