Base: Insert newlines in the checksum(1) synopsis

Author: https://github.com/timschumi
Commit: cbdd44b6d2
Pull-request: https://github.com/SerenityOS/serenity/pull/19537
Reviewed-by: https://github.com/gmta ✅

Base/usr/share/man/man1/checksum.md

@@ -4,10 +4,10 @@ checksum - helper program for calculating checksums
 
 ## Synopsis
 
-`$ md5sum [options...] <file...>`
-`$ sha1sum [options...] <file...>`
-`$ sha256sum [options...] <file...>`
-`$ sha512sum [options...] <file...>`
+`$ md5sum [options...] <file...>`  
+`$ sha1sum [options...] <file...>`  
+`$ sha256sum [options...] <file...>`  
+`$ sha512sum [options...] <file...>`  
 
 ## Description