Fix space after keywords with parenthesized expression

src/runestone.jl

@@ -809,7 +809,7 @@ end
 # TODO: local, const
 function spaces_around_keywords(ctx::Context, node::Node)
     is_leaf(node) && return nothing
-    keyword_set = KSet"where do mutable struct abstract primitive type function if elseif catch"
+    keyword_set = KSet"where do mutable struct abstract primitive type function if elseif catch while"
     if !(kind(node) in keyword_set)
         return nothing
     end
@@ -907,8 +907,8 @@ function spaces_around_keywords(ctx::Context, node::Node)
             elseif !space_after && kind(last_leaf(kid)) === K"Whitespace"
                 @assert false # Unreachable?
             else
-                # Reachable in e.g. `T where{T}`, insert space
+                # Reachable in e.g. `T where{T}`, `if(`, ... insert space
-                @assert kind(node) === K"where"
+                @assert kind(node) in KSet"where if elseif while"
                 any_changes = true
                 if kids′ === kids
                     kids′ = kids[1:(i - 1)]

test/runtests.jl

@@ -392,6 +392,9 @@ end
     @test format_string("try\nerror()\ncatch\nend") == "try\n    error()\ncatch\nend"
     @test format_string("A where{T}") == "A where {T}"
     @test format_string("A{T}where{T}") == "A{T} where {T}"
+    # Some keywords can have a parenthesized expression directly after without the space...
+    @test format_string("if(a)\nelseif(b)\nend") == "if (a)\nelseif (b)\nend"
+    @test format_string("while(a)\nend") == "while (a)\nend"
 end
 
 @testset "replace ∈ and = with in in for loops and generators" begin