[1253] 修复 Ghostscript 输出路径包含空格时图片加载失败 - #4467
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关联 Issue
Closes #3978
What
TeXmacs/plugins/binary/progs/binary/gs.scm中，为gs-eps-to-pdf、gs-eps-to-png和gs-pdf-to-png的-sOutputFile=参数值加上string-quote包裹。CLAUDE.md开发规范说明：修改 Scheme 代码无需重新编译，在 Windows 下执行xmake i stem同步资源。devel/1253.md。Why
当用户名或临时目录路径包含空格（如 Linux/macOS 下
/tmp/Kovács Zoltán/...）时，未加引号的-sOutputFile=参数会被 Ghostscript 在空格处截断，导致 Ghostscript 报错无法生成目标文件，嵌入的 EPS/PDF 等图片无法加载显示。How
使用
string-quote对(url->system to)进行转义包裹双引号，生成-sOutputFile="..."，使 Ghostscript 能正确接收包含空格的目标文件路径。