diff --git a/internal/buildfile/reader.go b/internal/buildfile/reader.go
index 09eec2f..aa65284 100644
--- a/internal/buildfile/reader.go
+++ b/internal/buildfile/reader.go
@@ -57,7 +57,7 @@ func NewReader(ctx *instruction.ExecutionContext, buildfile io.Reader) (*Reader,
 	// add each line as instruction
 	l, reader := 0, bufio.NewReader(buildfile)
 	eof := false
-	var section *[]instruction.T = nil // current section
+	var section *[]instruction.T // current section
 	for {
 		l++
 		if eof {
@@ -139,8 +139,8 @@ func (r *Reader) Execute(_dryRun ...bool) error {
 	table := make([]tableSection, 0)
 	index := make(map[string]int, 0)
 
-	var pre *[]instruction.T = nil
-	var preTable *tableSection = nil
+	var pre *[]instruction.T
+	var preTable *tableSection
 
 	for secname, sec := range r.Content {
 
@@ -202,7 +202,7 @@ func execSection(section *[]instruction.T, ctx instruction.ExecutionContext, tse
 
 	for i, inst := range *section {
 		tsec.instructions[i].start = time.Now()
-		var err error = nil
+		var err error
 		if dryRun {
 			_, err = inst.DryRun(ctx)
 		} else {
diff --git a/internal/clifmt/symbols.go b/internal/clifmt/symbols.go
index b9ecf96..b4dd20b 100644
--- a/internal/clifmt/symbols.go
+++ b/internal/clifmt/symbols.go
@@ -92,7 +92,7 @@ func DisplaySize(s string) int {
 	matches = reDots.FindAllString(s, -1)
 	for _, m := range matches {
 		size -= len(m)
-		size += 1
+		size++
 	}
 
 	return size
diff --git a/internal/cnf/loader.go b/internal/cnf/loader.go
index 10a4aae..bec0f63 100644
--- a/internal/cnf/loader.go
+++ b/internal/cnf/loader.go
@@ -12,7 +12,7 @@ var ErrUnknownExtension = errors.New("unknown extension format")
 // ErrUnknownFormat is raised when the format cannot be guessed from the content of the file
 var ErrUnknownFormat = errors.New("cannot infer format from content")
 
-// ErrUnknownFormat is raised when required file does not exist
+// ErrFileNotExist is raised when required file does not exist
 var ErrFileNotExist = errors.New("cannot find file")
 
 // Load the current file and create the configuration format accordingly
diff --git a/internal/instruction/errors.go b/internal/instruction/errors.go
index 3ad5cc4..ecbc4e4 100644
--- a/internal/instruction/errors.go
+++ b/internal/instruction/errors.go
@@ -14,6 +14,7 @@ var ErrInvalidSyntax = fmt.Errorf("invalid instruction format")
 // it can mean that you're not using the right version or that you've misspelled it
 var ErrUnknownInstruction = fmt.Errorf("unknown instruction")
 
+// FileError is used for file-specific errors
 type FileError struct {
 	Reason string
 	File   string