Add a verbose mode: -S verbose

src/ShellCheck/Formatter/Format.hs

@@ -47,6 +47,7 @@ severityText pc =
         WarningC -> "warning"
         InfoC    -> "info"
         StyleC   -> "style"
+        VerboseC -> "verbose"
 
 -- Realign comments from a tabstop of 8 to 1
 makeNonVirtual comments contents =

src/ShellCheck/Formatter/TTY.hs

@@ -57,6 +57,7 @@ colorForLevel level =
         "warning" -> 33 -- yellow
         "info"    -> 32 -- green
         "style"   -> 32 -- green
+        "verbose" -> 32 -- green
         "message" -> 1 -- bold
         "source"  -> 0 -- none
         _ -> 0         -- none

src/ShellCheck/Interface.hs

@@ -32,7 +32,7 @@ module ShellCheck.Interface
     , ExecutionMode(Executed, Sourced)
     , ErrorMessage
     , Code
-    , Severity(ErrorC, WarningC, InfoC, StyleC)
+    , Severity(ErrorC, WarningC, InfoC, StyleC, VerboseC)
     , Position(posFile, posLine, posColumn)
     , Comment(cSeverity, cCode, cMessage)
     , PositionedComment(pcStartPos , pcEndPos , pcComment, pcFix)
@@ -189,7 +189,7 @@ data ExecutionMode = Executed | Sourced deriving (Show, Eq)
 type ErrorMessage = String
 type Code = Integer
 
-data Severity = ErrorC | WarningC | InfoC | StyleC
+data Severity = ErrorC | WarningC | InfoC | StyleC | VerboseC
     deriving (Show, Eq, Ord, Generic, NFData)
 data Position = Position {
     posFile :: String,    -- Filename