fix(knot-diagrams): resolve bitwise overflow and test syntax error

Author: hyperpolymath

KnotDiagrams/src/smoothing.jl

@@ -61,7 +61,7 @@ Returns a vector of `(state, num_circles)` pairs.
 """
 function enumerate_states(gc::GaussCode)
     n = gc.num_crossings
-    total = 1 << n  # 2^n
+    total = UInt(1) << n  # 2^n
     results = Vector{Tuple{UInt,Int}}(undef, total)
 
     for s in UInt(0):UInt(total - 1)

KnotDiagrams/test/runtests.jl

@@ -202,7 +202,7 @@ using KnotDiagrams
         diagrams = prime_knots_up_to_7()
         for d in diagrams
             fd = fragment_distribution(d)
-            @test fd.summary.classification == :spread "$(d.name) should be spread"
+            @test fd.summary.classification == :spread
         end
     end