gofmt (read Go format) is Go's absolutly most powerful feature, this is even more a culture than a feature but its hard integration with Go and its community effecitvly qualifies it as a feature
gofmt help text:
-d
Do not print reformatted sources to standard output.
If a file's formatting is different than gofmt's, print diffs
to standard output.
-e
Print all (including spurious) errors.
-l
Do not print reformatted sources to standard output.
If a file's formatting is different from gofmt's, print its name
to standard output.
-r rule
Apply the rewrite rule to the source before reformatting.
-s
Try to simplify code (after applying the rewrite rule, if any).
-w
Do not print reformatted sources to standard output.
If a file's formatting is different from gofmt's, overwrite it
with gofmt's version. If an error occurred during overwriting,
the original file is restored from an automatic backup.
Every odd file represents a malformat file and every following even file represents the output of gofmt -w, basically applying the Go Format