Prepend underscore to variable name DOCUMENTCLASS

Author: Socob

lib/matplotlib/backends/backend_pgf.py

@@ -29,7 +29,7 @@
 _log = logging.getLogger(__name__)
 
 
-DOCUMENTCLASS = r"\documentclass{article}"
+_DOCUMENTCLASS = r"\documentclass{article}"
 
 
 # Note: When formatting floating point values, it is important to use the
@@ -202,7 +202,7 @@ class LatexManager:
     @staticmethod
     def _build_latex_header():
         latex_header = [
-            DOCUMENTCLASS,
+            _DOCUMENTCLASS,
             # Include TeX program name as a comment for cache invalidation.
             # TeX does not allow this to be the first line.
             rf"% !TeX program = {mpl.rcParams['pgf.texsystem']}",
@@ -831,7 +831,7 @@ def print_pdf(self, fname_or_fh, *, metadata=None, **kwargs):
             self.print_pgf(tmppath / "figure.pgf", **kwargs)
             (tmppath / "figure.tex").write_text(
                 "\n".join([
-                    DOCUMENTCLASS,
+                    _DOCUMENTCLASS,
                     r"\usepackage[pdfinfo={%s}]{hyperref}" % pdfinfo,
                     r"\usepackage[papersize={%fin,%fin}, margin=0in]{geometry}"
                     % (w, h),
@@ -941,7 +941,7 @@ def _write_header(self, width_inches, height_inches):
         pdfinfo = ','.join(
             _metadata_to_str(k, v) for k, v in self._info_dict.items())
         latex_header = "\n".join([
-            DOCUMENTCLASS,
+            _DOCUMENTCLASS,
             r"\usepackage[pdfinfo={%s}]{hyperref}" % pdfinfo,
             r"\usepackage[papersize={%fin,%fin}, margin=0in]{geometry}"
             % (width_inches, height_inches),