Allow no space before comment after `(`, `[`, `{`, fixes #81.

src/runestone.jl

@@ -3451,7 +3451,9 @@ function spaces_around_comments(ctx::Context, node::Node)
             push!(kids′, kid′)
         end
         accept_node!(ctx, kid′)
-        prev_kid_ends_with_ws = kind(kid′) in KSet"Whitespace NewlineWs" ||
+        # Note: This allows (but doesn't require) no space after opening brackets, see
+        # https://github.com/fredrikekre/Runic.jl/issues/81
+        prev_kid_ends_with_ws = kind(kid′) in KSet"Whitespace NewlineWs ( { [" ||
             (ll = last_leaf(kid′); ll !== nothing && kind(ll) in KSet"Whitespace NewlineWs")
     end
     # Reset the stream and return

test/runtests.jl

@@ -87,6 +87,11 @@ end
         @test format_string("(a,$(sp)# comment\nb + b)") ==
             "(\n    a,$(csp)# comment\n    b + b,\n)"
         @test format_string("if c$(sp)# a\n    b\nend") == "if c$(csp)# a\n    b\nend"
+        # Allow no space after opening brackets
+        # (https://github.com/fredrikekre/Runic.jl/issues/81)
+        for (o, c) in (("(", ")"), ("[", "]"), ("{", "}"))
+            @test format_string("$(o)$(sp)#= a =#$(sp)$(c)") == "$(o)$(sp)#= a =#$(c)"
+        end
     end
     let str = "a = 1  # a comment\nab = 2 # ab comment\n"
         @test format_string(str) == str