fix latex in windows (#421)

* change tex2svg command for windows case
JuliaAnimators · Sep 18, 2021 · 5318148 · 5318148
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,4 +1,5 @@
 # Javis.jl - Changelog
+- Added fix to `latex` function to make it work better on Windows.
 
 ## v0.6.3 (17th of September 2021)
 - `RFrames` is ignored when used in the first `Action` of an `Object`

diff --git a/src/latex.jl b/src/latex.jl
@@ -143,8 +143,12 @@ function get_latex_svg(text::LaTeXString)
     if haskey(LaTeXSVG, text)
         svg = LaTeXSVG[text]
     else
-        ts = strip_eq(text)
-        command = `tex2svg $ts`
+        ts = replace(strip_eq(text), "\n" => " ")
+        command = if Sys.iswindows()
+            `cmd /C tex2svg $ts`
+        else
+            `tex2svg $ts`
+        end
         try
             svg = read(command, String)
         catch e