audit all calls to app.eval

Dependencies

• [2] ECUOUZI7 load manifest in correct order
• [3] OJLXS67N a prefix for metadata in the manifest
• [4] OFRGJFGI specify app in manifest
• [5] TNRO6KLZ new live app

Change contents

• edit in main.lua at line 127
  [3.3724]

  [3.3724]
  + -- return any error encountered, or nil if all well
• replacement in main.lua at line 141
  [2.224]→[2.224:242](∅→∅)
  − app.eval(buf)
  [2.224]

  [2.242]
  + local status, err = app.eval(buf)

  + if not status then

  + return err

  + end
• replacement in main.lua at line 237
  [3.6077]→[3.6077:6109](∅→∅)
  − app.eval(binding..' = nil')
  [3.6077]

  [3.6109]
  + app.eval(binding..' = nil') -- ignore errors which will likely be from keywords like `function = nil`