fix typo (#1503)

app/router/balancing.go

@@ -27,7 +27,7 @@ type Balancer struct {
 	override override
 }
 
-// PickOutbound picks the tag of a outbound
+// PickOutbound picks the tag of an outbound
 func (b *Balancer) PickOutbound() (string, error) {
 	candidates, err := b.SelectOutbounds()
 	if err != nil {

app/router/condition.go

@@ -149,7 +149,7 @@ type PortMatcher struct {
 	onSource bool
 }
 
-// NewPortMatcher create a new port matcher that can match source or destination port
+// NewPortMatcher creates a new port matcher that can match source or destination port
 func NewPortMatcher(list *net.PortList, onSource bool) *PortMatcher {
 	return &PortMatcher{
 		port:     net.PortListFromProto(list),

app/router/router.go

@@ -126,7 +126,7 @@ func (r *Router) Close() error {
 	return nil
 }
 
-// Type implement common.HasType.
+// Type implements common.HasType.
 func (*Router) Type() interface{} {
 	return routing.RouterType()
 }

app/router/weight.go

@@ -28,7 +28,7 @@ type WeightManager struct {
 	defaultWeight float64
 }
 
-// Get get the weight of specified tag
+// Get gets the weight of specified tag
 func (s *WeightManager) Get(tag string) float64 {
 	weight, ok := s.cache[tag]
 	if ok {

common/strmatcher/matchers.go

@@ -133,7 +133,7 @@ type MatcherGroupForRegex interface {
 	AddRegexMatcher(matcher *RegexMatcher, value uint32)
 }
 
-// AddMatcherGroup is a helper function to try to add a Matcher to any kind of MatcherGroup.
+// AddMatcherToGroup is a helper function to try to add a Matcher to any kind of MatcherGroup.
 // It returns error if the MatcherGroup does not accept the provided Matcher's type.
 // This function is provided to help writing code to test a MatcherGroup.
 func AddMatcherToGroup(g MatcherGroup, matcher Matcher, value uint32) error {