chore(common): normalize error msg

common/error.go

@@ -7,14 +7,14 @@ var (
     ErrInvalidURL      = errors.New("url is invalid")
     ErrInvalidURLLen   = errors.New("url is too short or too long, should be 7-2048 chars")
     ErrBlacklistedURL  = errors.New("url matches blacklist pattern")
-    ErrKeywordsCount   = errors.New("url must not have more than 10 keywords")
+    ErrKeywordsCount   = errors.New("keywords must not be more than 10")
     ErrKeywordLength   = errors.New("keyword must contain 2-25 characters")
     ErrInvalidDate     = errors.New("expires_on should be in 'yyyy-mm-dd hh:mm:ss' format")
     ErrPastExpiration  = errors.New("expires_on can not be date in past")
-    ErrURLAlreadyShort = errors.New("the url is already shortened")
-    ErrNoMatchingData  = errors.New("no data matching given criteria found")
+    ErrURLAlreadyShort = errors.New("url is already shortened")
+    ErrNoMatchingData  = errors.New("no data matching given criteria")
     ErrTokenRequired   = errors.New("auth token is required")
     ErrTokenInvalid    = errors.New("auth token is invalid")
     ErrShortCodeEmpty  = errors.New("short_code must not be empty")
-    ErrNoShortCode     = errors.New("the given short_code is not found")
+    ErrNoShortCode     = errors.New("short_code is not found")
 )