Merge pull request #14194 from meeseeksmachine/auto-backport-of-pr-14167-on-v3.1.x

timhoffm · web-flow · commit da977d611a11 · 2019-05-12T11:25:08.000+02:00
Backport PR #14167 on branch v3.1.x (Fix backend_pgf header.)
diff --git a/lib/matplotlib/backends/backend_pgf.py b/lib/matplotlib/backends/backend_pgf.py
@@ -212,9 +212,10 @@ def _build_latex_header():
         # fonts later when we don't expect the additional output on stdout.
         # TODO: is this sufficient?
         latex_header = [
+            r"\documentclass{minimal}",
             # Include TeX program name as a comment for cache invalidation.
+            # TeX does not allow this to be the first line.
             r"% !TeX program = {}".format(rcParams["pgf.texsystem"]),
-            r"\documentclass{minimal}",
             latex_preamble,
             latex_fontspec,
             r"\begin{document}",
