Significant runtime blowup when formatting pattern guards

[Philonous]

Floskell takes 6s on my machine to reformat the following code fragment:

foo x | Just x1 <- Just x
      , Just x2 <- Just x1
      , Just x3 <- Just x2
      , Just x4 <- Just x3
      , Just x5 <- Just x4
      , Just x6 <- Just x5
      , Just x7 <- Just x6
      = True

• On my production code it takes up to 4 minutes for 20 lines.
• Removing one of the pattern guards makes it complete instantly
• Removing floskell.json and using the implicit or an empty configuration makes it complete instantly
• The smallest floskell.json I can reproduce this with is { "style": "cramer" }; I have not tried to find the individual option from the style that causes this
• I'm running floskell 0.10.5