Many LaTeX backend fixes

After this commit, we can run with `--latex` on all boot libraries
without crashing (although the generated LaTeX still fails to compile in
a handful of larger packages like `ghc` and `base`).

 * Add newlines after all block elements in LaTeX. This is important to
   prevent the final output from being more an more indented. See the
   `latext-test/src/Example` test case for a sample of this.

 * Support associated types in class declarations (but not yet defaults)

 * Several small issues for producing compiling LaTeX;
     - avoid empy `\haddockbeginargs` lists (ex: `type family Any`)
     - properly escape identifiers depending on context (ex: `Int#`)
     - add `vbox` around `itemize`/`enumerate` (so they can be in tables)

 * Several spacing fixes:
     - limit the width of `Pretty`-arranged monospaced code
     - cut out extra space characters in export lists
     - only escape spaces if there are _multiple_ spaces
     - allow type signatures to be multiline (even without docs)

 * Remove uninteresting and repetitive `main.tex`/`haddock.sty` files
   from `latex-test` test reference output.

Fixes #935, #929 (LaTeX docs for `text` build & compile)
Fixes #727, #930 (I think both are really about type families...)

1 files changed, 11 insertions, 15 deletions

diff --git a/latex-test/ref/NamespacedIdentifier/NamespacedIdentifiers.tex b/latex-test/ref/NamespacedIdentifier/NamespacedIdentifiers.tex
index f39bd0ec..44c052c6 100644
--- a/latex-test/ref/NamespacedIdentifier/NamespacedIdentifiers.tex
+++ b/latex-test/ref/NamespacedIdentifier/NamespacedIdentifiers.tex
@@ -3,39 +3,35 @@
 \haddockbeginheader
 {\haddockverb\begin{verbatim}
 module NamespacedIdentifiers (
-    Foo(Bar),  Bar
+    Foo(Bar), Bar
   ) where\end{verbatim}}
 \haddockendheader
 
 \begin{haddockdesc}
 \item[\begin{tabular}{@{}l}
-data\ Foo
-\end{tabular}]\haddockbegindoc
+data Foo
+\end{tabular}]
+{\haddockbegindoc
 A link to:\par
-\begin{itemize}
+\vbox{\begin{itemize}
 \item
 the type \haddockid{Bar}\par
-
 \item
 the constructor \haddockid{Bar}\par
-
 \item
 the unimported but qualified type \haddockid{A}\par
-
 \item
 the unimported but qualified value \haddockid{A}\par
-
-\end{itemize}
-
+\end{itemize}}
 \enspace \emph{Constructors}\par
 \haddockbeginconstrs
 \haddockdecltt{=} & \haddockdecltt{Bar} & \\
-\end{tabulary}\par
+\end{tabulary}\par}
 \end{haddockdesc}
 \begin{haddockdesc}
 \item[\begin{tabular}{@{}l}
-data\ Bar
-\end{tabular}]\haddockbegindoc
-A link to the value \haddocktt{Foo} (which shouldn't exist).\par
-
+data Bar
+\end{tabular}]
+{\haddockbegindoc
+A link to the value \haddocktt{Foo} (which shouldn't exist).\par}
 \end{haddockdesc}
\ No newline at end of file