Fix single line do-end terminated by semicolon

src/runestone.jl

@@ -937,7 +937,7 @@ function spaces_around_keywords(ctx::Context, node::Node)
                 if kind(node) === K"do"
                     nkid = kids[i + 1]
                     @assert kind(nkid) === K"tuple"
-                    if !any(!JuliaSyntax.is_whitespace, verified_kids(nkid))
+                    if !any(x -> !(JuliaSyntax.is_whitespace(x) || kind(x) === K";"), verified_kids(nkid))
                         state = :closing
                     end
                 end
@@ -990,7 +990,7 @@ function spaces_around_keywords(ctx::Context, node::Node)
                 @assert false # Unreachable?
             else
                 # Reachable in e.g. `T where{T}`, `if(`, ... insert space
-                @assert kind(node) in KSet"where if elseif while"
+                @assert kind(node) in KSet"where if elseif while do"
                 any_changes = true
                 if kids′ === kids
                     kids′ = kids[1:(i - 1)]

test/runtests.jl

@@ -402,6 +402,7 @@ end
         @test format_string("A$(sp)where$(sp){T}$(sp)where$(sp){S}") == "A where {T} where {S}"
         @test format_string("f()$(sp)do$(sp)x\ny\nend") == "f() do x\n    y\nend"
         @test format_string("f()$(sp)do\ny\nend") == "f() do\n    y\nend"
+        @test format_string("f()$(sp)do; y end") == "f() do; y end"
         # After `where` (anywhere else?) a newline can be used instead of a space
         @test format_string("A$(sp)where$(sp)\n{A}") == "A where\n{A}"
     end