Don't insert an empty parameter when @typst_cmd has no parameters

NEWS.md

@@ -29,5 +29,6 @@
     - No longer errors during interpolation when `TypstString` isn't loaded
     - Handle interpolation and escaped interpolation in the same manner as double quotation marks
         - `print` and `show` now correspond
+- A `@typst_cmd` with no parameters no longer inserts an empty parameter
 - `AbstractFloat` values that satisfy `isinf` and `isnan` now correspond to `calc.inf` and `calc.nan`, respectively
 - `AbstractString` and `Text` no longer escape `$`

src/Commands.jl

@@ -114,7 +114,7 @@ typst`compile input.typ output.typ`
 ```
 """
 macro typst_cmd(parameters)
-    :(TypstCommand(map(string, split($parameters, " "))))
+    :(TypstCommand($(isempty(parameters) ? String[] : map(string, split(parameters, " ")))))
 end
 
 """
@@ -455,7 +455,7 @@ Print a [`TypstError`](@ref) when failing to [`run`](@ref) a [`TypstCommand`](@r
 
 ```jldoctest
 julia> showerror(stdout, TypstError(typst``))
-TypstError: failed to `run` a `TypstCommand([""])`
+TypstError: failed to `run` a `TypstCommand(String[])`
 ```
 """
 showerror(io::IO, te::TypstError) = print(io,

test/TestCommands.jl

@@ -5,7 +5,7 @@ using Test: @test, @testset, @test_throws, @test_warn
 using Typstry
 
 const tc = typst`help`
-const tc_error = typst``
+const tc_error = typst`a`
 const tc_ignorestatus = ignorestatus(tc_error)
 
 @testset "`Typstry`" begin

test/TestStrings.jl

@@ -8,6 +8,7 @@ using Typstry
 
 # TODO: test characters with multiple codeunits
 # TODO: test string escaping in `@typst_str`, `show`, `print`, `regex`, `TypstText`, etc
+# TODO: remove unnesessary methods (`IOBuffer`, `codeunit`, `pointer`)?
 
 struct X end