update tmp path

sphinxcontrib/d2lang/d2lang.py

@@ -42,7 +42,7 @@ class D2langDirective(SphinxDirective):
             else:
                 raise
         else:
-            with tempfile.NamedTemporaryFile() as fp:
+            with tempfile.NamedTemporaryFile(dir="./") as fp:
                 for line in self.content.data:
                     fp.write(bytes(line,'utf-8'))
                     fp.write(bytes('\n','utf-8'))
@@ -53,7 +53,12 @@ class D2langDirective(SphinxDirective):
 
 def build_svg(diag_src, out_dir, filename, layout):
     d2_bin = which('d2')
-    cmd_line = '%s -l %s %s %s' % (d2_bin, layout, diag_src, out_dir + "/" + filename)
+    cmd_line = '{bin} -l {layout} {src} {out}'.format(
+        bin=d2_bin,
+        layout=layout,
+        src=diag_src,
+        out=out_dir + "/" + filename
+    )
     args = shlex.split(cmd_line)
     subprocess.run(args)
     return True