added :displaysize as chunk option and chunks now respect displaysize

src/config.jl

@@ -17,8 +17,9 @@ const _DEFAULT_PARAMS = Dict{Symbol,Any}(
     :term => false,
     :prompt => "julia>",
     :label => nothing,
-    :wrap => true,
+    :wrap => false,
     :line_width => 75,
+    :displaysize => displaysize(),
     :fig_ext => nothing,
     :fig_pos => nothing,
     :fig_env => nothing,

src/run.jl

@@ -260,7 +260,11 @@ function eval_chunk(doc::WeaveDoc, chunk::CodeChunk, report::Report, mod::Module
         chunk.options[:out_width] = report.format.out_width
     end
 
-    chunk.result = run_code(doc, chunk, report, mod)
+    # Get the default `displaysize`.
+    lines, cols = chunk.options[:displaysize]
+    chunk.result = withenv("LINES" => lines, "COLUMNS" => cols) do
+        run_code(doc, chunk, report, mod)
+    end
 
     execute_posthooks!(chunk)