Improve haskell.nanorc

haskell.nanorc

@@ -1,9 +1,8 @@
-syntax "Haskell" "\.hs$"
+syntax "haskell" "\.hs$"
+comment "--"
 
 ## Keywords
-color red "[ ](as|case|of|class|data|default|deriving|do|forall|foreign|hiding|if|then|else|import|infix|infixl|infixr|instance|let|in|mdo|module|newtype|qualified|type|where)[ ]"
-color red "(^data|^foreign|^import|^infix|^infixl|^infixr|^instance|^module|^newtype|^type)[ ]"
-color red "[ ](as$|case$|of$|class$|data$|default$|deriving$|do$|forall$|foreign$|hiding$|if$|then$|else$|import$|infix$|infixl$|infixr$|instance$|let$|in$|mdo$|module$|newtype$|qualified$|type$|where$)"
+color red "\<(as|case|of|class|data|default|deriving|do|forall|foreign|hiding|if|then|else|import|infix|infixl|infixr|instance|let|in|mdo|module|newtype|qualified|type|where)\>"
 
 ## Various symbols
 color cyan "(\||@|!|:|_|~|=|\\|;|\(\)|,|\[|\]|\{|\})"
@@ -16,13 +15,15 @@ color cyan "(->|<-|=>)"
 color magenta "\.|\$"
 
 ## Data constructors
-color magenta "(True|False|Nothing|Just|Left|Right|LT|EQ|GT)"
+color magenta "\<(True|False|Nothing|Just|Left|Right|LT|EQ|GT)\>"
 
 ## Data classes
-color magenta "[ ](Read|Show|Enum|Eq|Ord|Data|Bounded|Typeable|Num|Real|Fractional|Integral|RealFrac|Floating|RealFloat|Monad|MonadPlus|Functor)"
+color magenta "\<(Read|Show|Enum|Eq|Ord|Data|Bounded|Typeable|Num|Real|Fractional|Integral|RealFrac|Floating|RealFloat|Monad|MonadPlus|Functor)\>"
 
 ## Strings
-color yellow ""[^\"]*""
+color yellow ""([^\"]|\\.)*""
+## Chars
+color brightyellow "'([^\']|\\.)'"
 
 ## Comments
 color green "--.*"