show for certain symbols (e and f) has extra space

[mattsignorelli]

Minor issue but for some reason there is an extra space for only the symbols e and f:

julia> @variables a b c d e f g h i
9-element Vector{Num}:
 a
 b
 c
 d
  e
  f
 g
 h
 i

julia> [a b c; d e f; g h i]
3×3 Matrix{Num}:
 a  b   c
 d   e   f
 g  h   i

[mattsignorelli]

The issue also gives very strange output for expressions:

julia> @variables a b c d e f g h i j
10-element Vector{Num}:
 a
 b
 c
 d
  e
  f
 g
 h
 i
 j

julia> [a b c d;
        b e f g;
        c f h i;
        d g i j]*[1,2,3,4]
4-element Vector{Num}:
 a + 2b + 3c + 4d
            b + 2e + 3f + 4g
            c + 2f + 3h + 4i
 d + 2g + 3i + 4j

The vector components containing any e or f are all misaligned with many spaces preceded

[bowenszhu]

I found that in Julia base they match e and f in https://github.com/JuliaLang/julia/blob/48d4fd48430af58502699fdf3504b90589df3852/base/show.jl#L3027
and if e or f is matched, extra space is padded on the left https://github.com/JuliaLang/julia/blob/48d4fd48430af58502699fdf3504b90589df3852/base/arrayshow.jl#L118