added sequence tests

tests/sequence/comment-align/.gitignore

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+# generated by tytanic, do not edit
+
+diff/**
+out/**

tests/sequence/comment-align/test.typ

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+#set page(width: auto, height: auto)
+#import "/src/lib.typ": *
+
+#diagram({
+  _par("alice", display-name: "Alice")
+  _par("bob", display-name: "Bob")
+  _seq("alice", "bob", comment: "This is a very long comment")
+
+  // Left to right
+  _seq("alice", "bob", comment: "Start aligned", comment-align: "start")
+  _seq("alice", "bob", comment: "End aligned", comment-align: "end")
+  _seq("alice", "bob", comment: "Left aligned", comment-align: "left")
+  _seq("alice", "bob", comment: "Right aligned", comment-align: "right")
+  _seq("alice", "bob", comment: "Centered", comment-align: "center")
+  _gap()
+
+  // Right to left
+  _seq("bob", "alice", comment: "Start aligned", comment-align: "start")
+  _seq("bob", "alice", comment: "End aligned", comment-align: "end")
+  _seq("bob", "alice", comment: "Left aligned", comment-align: "left")
+  _seq("bob", "alice", comment: "Right aligned", comment-align: "right")
+  _seq("bob", "alice", comment: "Centered", comment-align: "center")
+  _gap()
+
+  // Slant left to right
+  _seq("alice", "bob", comment: "Start aligned", comment-align: "start", slant: 10)
+  _seq("alice", "bob", comment: "End aligned", comment-align: "end", slant: 10)
+  _seq("alice", "bob", comment: "Left aligned", comment-align: "left", slant: 10)
+  _seq("alice", "bob", comment: "Right aligned", comment-align: "right", slant: 10)
+  _seq("alice", "bob", comment: "Centered", comment-align: "center", slant: 10)
+  _gap()
+
+  // Slant right to left
+  _seq("bob", "alice", comment: "Start aligned", comment-align: "start", slant: 10)
+  _seq("bob", "alice", comment: "End aligned", comment-align: "end", slant: 10)
+  _seq("bob", "alice", comment: "Left aligned", comment-align: "left", slant: 10)
+  _seq("bob", "alice", comment: "Right aligned", comment-align: "right", slant: 10)
+  _seq("bob", "alice", comment: "Centered", comment-align: "center", slant: 10)
+})
+
+#pagebreak()
+
+#diagram({
+  _par("alice", display-name: "Alice")
+
+  _seq("alice", "alice", comment: "Start aligned", comment-align: "start")
+  _seq("alice", "alice", comment: "End aligned", comment-align: "end")
+  _seq("alice", "alice", comment: "Left aligned", comment-align: "left")
+  _seq("alice", "alice", comment: "Right aligned", comment-align: "right")
+  _seq("alice", "alice", comment: "Centered", comment-align: "center")
+
+  _seq("alice", "alice", comment: "Start aligned", comment-align: "start", flip: true)
+  _seq("alice", "alice", comment: "End aligned", comment-align: "end", flip: true)
+  _seq("alice", "alice", comment: "Left aligned", comment-align: "left", flip: true)
+  _seq("alice", "alice", comment: "Right aligned", comment-align: "right", flip: true)
+  _seq("alice", "alice", comment: "Centered", comment-align: "center", flip: true)
+})

tests/sequence/special-par/.gitignore

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+# generated by tytanic, do not edit
+
+diff/**
+out/**

tests/sequence/special-par/test.typ

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+#set page(width: auto, height: auto)
+#import "/src/lib.typ": *
+
+#diagram({
+  _seq("?", "Alice", comment: [?->\ *short* to actor1])
+  _seq("[", "Alice", comment: [\[->\ *from start* to actor1])
+  _seq("[", "Bob", comment: [\[->\ *from start* to actor2])
+  _seq("?", "Bob", comment: [?->\ *short* to actor2])
+  _seq("Alice", "]", comment: [->\]\ from actor1 *to end*])
+  _seq("Alice", "?", comment: [->?\ *short* from actor1])
+  _seq("Alice", "Bob", comment: [->\ from actor1 to actor2])
+})

tests/sequence/tips/.gitignore

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+# generated by tytanic, do not edit
+
+diff/**
+out/**

tests/sequence/tips/test.typ

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+#set page(width: auto, height: auto)
+#import "/src/lib.typ": *
+
+#diagram({
+  _par("a", display-name: "Alice")
+  _par("b", display-name: "Bob")
+
+  _seq("a", "b", end-tip: ">", comment: `->`)
+  _seq("a", "b", end-tip: ">>", comment: `->>`)
+  _seq("a", "b", end-tip: "\\", comment: `-\`)
+  _seq("a", "b", end-tip: "\\\\", comment: `-\\`)
+  _seq("a", "b", end-tip: "/", comment: `-/`)
+  _seq("a", "b", end-tip: "//", comment: `-//`)
+  _seq("a", "b", end-tip: "x", comment: `->x`)
+  _seq("a", "b", start-tip: "x", comment: `x->`)
+  _seq("a", "b", start-tip: "o", comment: `o->`)
+  _seq("a", "b", end-tip: ("o", ">"), comment: `->o`)
+  _seq("a", "b", start-tip: "o", end-tip: ("o", ">"), comment: `o->o`)
+  _seq("a", "b", start-tip: ">", end-tip: ">", comment: `<->`)
+  _seq("a", "b", start-tip: ("o", ">"), end-tip: ("o", ">"), comment: `o<->o`)
+  _seq("a", "b", start-tip: "x", end-tip: "x", comment: `x<->x`)
+  _seq("a", "b", end-tip: ("o", ">>"), comment: `->>o`)
+  _seq("a", "b", end-tip: ("o", "\\"), comment: `-\o`)
+  _seq("a", "b", end-tip: ("o", "\\\\"), comment: `-\\o`)
+  _seq("a", "b", end-tip: ("o", "/"), comment: `-/o`)
+  _seq("a", "b", end-tip: ("o", "//"), comment: `-//o`)
+  _seq("a", "b", start-tip: "x", end-tip: ("o", ">"), comment: `x->o`)
+})
+
+#pagebreak()
+
+#diagram({
+  _par("a", display-name: "Alice")
+  _par("b", display-name: "Bob")
+
+  _seq("b", "a", end-tip: ">", comment: `->`)
+  _seq("b", "a", end-tip: ">>", comment: `->>`)
+  _seq("b", "a", end-tip: "\\", comment: `-\`)
+  _seq("b", "a", end-tip: "\\\\", comment: `-\\`)
+  _seq("b", "a", end-tip: "/", comment: `-/`)
+  _seq("b", "a", end-tip: "//", comment: `-//`)
+  _seq("b", "a", end-tip: "x", comment: `->x`)
+  _seq("b", "a", start-tip: "x", comment: `x->`)
+  _seq("b", "a", start-tip: "o", comment: `o->`)
+  _seq("b", "a", end-tip: ("o", ">"), comment: `->o`)
+  _seq("b", "a", start-tip: "o", end-tip: ("o", ">"), comment: `o->o`)
+  _seq("b", "a", start-tip: ">", end-tip: ">", comment: `<->`)
+  _seq("b", "a", start-tip: ("o", ">"), end-tip: ("o", ">"), comment: `o<->o`)
+  _seq("b", "a", start-tip: "x", end-tip: "x", comment: `x<->x`)
+  _seq("b", "a", end-tip: ("o", ">>"), comment: `->>o`)
+  _seq("b", "a", end-tip: ("o", "\\"), comment: `-\o`)
+  _seq("b", "a", end-tip: ("o", "\\\\"), comment: `-\\o`)
+  _seq("b", "a", end-tip: ("o", "/"), comment: `-/o`)
+  _seq("b", "a", end-tip: ("o", "//"), comment: `-//o`)
+  _seq("b", "a", start-tip: "x", end-tip: ("o", ">"), comment: `x->o`)
+})
+
+#pagebreak()
+
+#diagram({
+  _par("a", display-name: "Alice")
+  _par("b", display-name: "Bob")
+
+  _seq("a", "a", end-tip: ">", comment: `->`)
+  _seq("a", "a", end-tip: ">>", comment: `->>`)
+  _seq("a", "a", end-tip: "\\", comment: `-\`)
+  _seq("a", "a", end-tip: "\\\\", comment: `-\\`)
+  _seq("a", "a", end-tip: "/", comment: `-/`)
+  _seq("a", "a", end-tip: "//", comment: `-//`)
+  _seq("a", "a", end-tip: "x", comment: `->x`)
+  _seq("a", "a", start-tip: "x", comment: `x->`)
+  _seq("a", "a", start-tip: "o", comment: `o->`)
+  _seq("a", "a", end-tip: ("o", ">"), comment: `->o`)
+  _seq("a", "a", start-tip: "o", end-tip: ("o", ">"), comment: `o->o`)
+  _seq("a", "a", start-tip: ">", end-tip: ">", comment: `<->`)
+  _seq("a", "a", start-tip: ("o", ">"), end-tip: ("o", ">"), comment: `o<->o`)
+  _seq("a", "a", start-tip: "x", end-tip: "x", comment: `x<->x`)
+  _seq("a", "a", end-tip: ("o", ">>"), comment: `->>o`)
+  _seq("a", "a", end-tip: ("o", "\\"), comment: `-\o`)
+  _seq("a", "a", end-tip: ("o", "\\\\"), comment: `-\\o`)
+  _seq("a", "a", end-tip: ("o", "/"), comment: `-/o`)
+  _seq("a", "a", end-tip: ("o", "//"), comment: `-//o`)
+  _seq("a", "a", start-tip: "x", end-tip: ("o", ">"), comment: `x->o`)
+})