simplify paragraphyText, it's now much better behaved

parser-typechecker/src/Unison/CommandLine/DisplayValues.hs

@@ -49,7 +49,7 @@ displayDoc :: (Var v, Monad m)
 displayDoc ppe terms typeOf evaluated types t = go t
   where
   go (DD.DocJoin docs) = foldMap id <$> traverse go docs
-  go (DD.DocBlob txt) = pure $ P.text txt
+  go (DD.DocBlob txt) = pure $ P.paragraphyText txt
   go (DD.DocLink (DD.LinkTerm (Term.TermLink' r))) = pure $ P.underline (termName ppe r)
   go (DD.DocLink (DD.LinkType (Term.TypeLink' r))) = pure $ P.underline (typeName ppe r)
   go (DD.DocSource (DD.LinkTerm (Term.TermLink' r))) = prettyTerm terms r 

parser-typechecker/src/Unison/Util/Pretty.hs

@@ -143,22 +143,15 @@ wrapImpl (p:ps) = wrap_ . Seq.fromList $
 wrapString :: (LL.ListLike s Char, IsString s) => String -> Pretty s
 wrapString s = wrap (lit $ fromString s)
 
--- 0. Preserve all leading and trailing spaces
--- 1. Convert multiple adjacent blank lines to a single blank line.
--- 2. Combine adjacent non-blank lines into one line.
--- 3. Wrap each remaining line.
+-- 0. Preserve all leading and trailing whitespace 
+-- 1. Preserve all newlines
+-- 2. Wrap all text in between newlines
 paragraphyText :: (LL.ListLike s Char, IsString s) => Text -> Pretty s
-paragraphyText t = case span isSpace (Text.unpack $ Text.dropWhileEnd isSpace t) of 
-  (sp,t) -> string sp <> lines (go mempty t)
-  where
-  trailingSp = Text.takeWhileEnd isSpace t
-  go acc [] = [wrap acc <> text trailingSp]
-  go acc (span isSpace -> (sp, rest)) = 
-    if length (filter (=='\n') sp) < 2 then munch acc
-    else wrap acc : mempty : munch mempty
-    where
-    munch acc = case break isSpace rest of
-      (nonsp, rest) -> go (acc <> string nonsp) rest
+paragraphyText t = text start <> inner <> text end where
+  inner = sep "\n" . fmap (wrap . text) . Text.splitOn "\n" $ t'
+  (start, t0) = Text.span isSpace t
+  t' = Text.dropWhileEnd isSpace t0
+  end = Text.takeWhileEnd isSpace t0
 
 wrap :: (LL.ListLike s Char, IsString s) => Pretty s -> Pretty s
 wrap p = wrapImpl (toLeaves [p]) where

unison-src/transcripts/docs.md

@@ -50,7 +50,7 @@ use .builtin
 
 docs.List.take = [:
 
-`@List.take n xs` returns the first `n` elements of `xs`
+`@List.take n xs` returns the first `n` elements of `xs`. (No need to add line breaks manually. The display command will do wrapping of text for you.)
 
 ## Examples:
 

unison-src/transcripts/docs.output.md

@@ -92,7 +92,7 @@ use .builtin
 
 docs.List.take = [:
 
-`@List.take n xs` returns the first `n` elements of `xs`
+`@List.take n xs` returns the first `n` elements of `xs`. (No need to add line breaks manually. The display command will do wrapping of text for you.)
 
 ## Examples:
 
@@ -147,7 +147,9 @@ Now that documentation is linked to the definition. We can view it if we like:
 
 .> display 1
 
-  `builtin.List.take n xs` returns the first `n` elements of `xs`
+  `builtin.List.take n xs` returns the first `n` elements of
+  `xs`. (No need to add line breaks manually. The display
+  command will do wrapping of text for you.)
   
   ## Examples:
   
@@ -166,7 +168,9 @@ Or there's also a convenient function, `docs`, which shows the `Doc` values that
 ```ucm
 .> docs builtin.List.take
 
-  `builtin.List.take n xs` returns the first `n` elements of `xs`
+  `builtin.List.take n xs` returns the first `n` elements of
+  `xs`. (No need to add line breaks manually. The display
+  command will do wrapping of text for you.)
   
   ## Examples: