dev: enable whitespace linter on this repo

The whitespace linter was added in #673. Enable it and fix found issues.

Author: jirfag

.golangci.yml

@@ -75,6 +75,7 @@ linters:
     - unparam
     - unused
     - varcheck
+    - whitespace
 
   # don't enable:
   # - depguard - until https://github.com/OpenPeeDeeP/depguard/issues/7 gets fixed

pkg/commands/config.go

@@ -34,7 +34,6 @@ func (e *Executor) initConfig() {
 	}
 	e.initRunConfiguration(pathCmd) // allow --config
 	cmd.AddCommand(pathCmd)
-
 }
 
 func (e *Executor) executePathCmd(_ *cobra.Command, args []string) {

pkg/lint/load.go

@@ -39,7 +39,6 @@ type ContextLoader struct {
 
 func NewContextLoader(cfg *config.Config, log logutils.Log, goenv *goutil.Env,
 	lineCache *fsutils.LineCache, fileCache *fsutils.FileCache) *ContextLoader {
-
 	return &ContextLoader{
 		cfg:         cfg,
 		log:         log,

pkg/lint/runner.go

@@ -31,7 +31,6 @@ type Runner struct {
 
 func NewRunner(astCache *astcache.Cache, cfg *config.Config, log logutils.Log, goenv *goutil.Env,
 	lineCache *fsutils.LineCache, dbManager *lintersdb.Manager) (*Runner, error) {
-
 	icfg := cfg.Issues
 	excludePatterns := icfg.ExcludePatterns
 	if icfg.UseDefaultExcludes {
@@ -101,7 +100,6 @@ type lintRes struct {
 
 func (r *Runner) runLinterSafe(ctx context.Context, lintCtx *linter.Context,
 	lc *linter.Config) (ret []result.Issue, err error) {
-
 	defer func() {
 		if panicData := recover(); panicData != nil {
 			err = fmt.Errorf("panic occurred: %s", panicData)