common: Fix golint errors

common/errors/errors.go:21:1: comment on exported var FeatureNotAvailableErr should be of the form "FeatureNotAvailableErr ..."
common/errors/errors.go:23:5: error var FeatureNotAvailableErr should have name of the form ErrFoo
common/maps/scratch.go:76:1: comment on exported method Scratch.Delete should be of the form "Delete ..."
common/maps/scratch.go:133:1: exported function NewScratch should have comment or be unexported
common/types/types.go:44:1: exported function NewKeyValuesStrings should have comment or be unexported

1 files changed, 4 insertions, 3 deletions

diff --git a/common/maps/scratch.go b/common/maps/scratch.go
index d00971435..4b062d139 100644
--- a/common/maps/scratch.go
+++ b/common/maps/scratch.go
@@ -73,7 +73,7 @@ func (c *Scratch) Set(key string, value interface{}) string {
 	return ""
 }
 
-// Reset deletes the given key
+// Delete deletes the given key.
 func (c *Scratch) Delete(key string) string {
 	c.mu.Lock()
 	delete(c.values, key)
@@ -81,7 +81,7 @@ func (c *Scratch) Delete(key string) string {
 	return ""
 }
 
-// Get returns a value previously set by Add or Set
+// Get returns a value previously set by Add or Set.
 func (c *Scratch) Get(key string) interface{} {
 	c.mu.RLock()
 	val := c.values[key]
@@ -104,7 +104,7 @@ func (c *Scratch) SetInMap(key string, mapKey string, value interface{}) string
 	return ""
 }
 
-// GetSortedMapValues returns a sorted map previously filled with SetInMap
+// GetSortedMapValues returns a sorted map previously filled with SetInMap.
 func (c *Scratch) GetSortedMapValues(key string) interface{} {
 	c.mu.RLock()
 
@@ -130,6 +130,7 @@ func (c *Scratch) GetSortedMapValues(key string) interface{} {
 	return sortedArray
 }
 
+// NewScratch returns a new instance Scratch.
 func NewScratch() *Scratch {
 	return &Scratch{values: make(map[string]interface{})}
 }