Slightly reformat tex source generation.

Author: anntzer

lib/matplotlib/texmanager.py

@@ -184,31 +184,34 @@ def _get_tex_source(self, tex, fontsize):
                    r'\rmfamily')
         return "\n".join([
             r"\documentclass{article}",
-            # Pass-through \mathdefault, which is used in non-usetex mode to
-            # use the default text font but was historically suppressed in
-            # usetex mode.
+            r"% Pass-through \mathdefault, which is used in non-usetex mode",
+            r"% to use the default text font but was historically suppressed",
+            r"% in usetex mode.",
             r"\newcommand{\mathdefault}[1]{#1}",
             self._font_preamble,
             r"\usepackage[utf8]{inputenc}",
             r"\DeclareUnicodeCharacter{2212}{\ensuremath{-}}",
-            # geometry is loaded before the custom preamble as convert_psfrags
-            # relies on a custom preamble to change the geometry.
+            r"% geometry is loaded before the custom preamble as ",
+            r"% convert_psfrags relies on a custom preamble to change the ",
+            r"% geometry.",
             r"\usepackage[papersize=72in, margin=1in]{geometry}",
             self.get_custom_preamble(),
-            # Use `underscore` package to take care of underscores in text
-            # The [strings] option allows to use underscores in file names
+            r"% Use `underscore` package to take care of underscores in text.",
+            r"% The [strings] option allows to use underscores in file names.",
             _usepackage_if_not_loaded("underscore", option="strings"),
-            # Custom packages (e.g. newtxtext) may already have loaded textcomp
-            # with different options.
+            r"% Custom packages (e.g. newtxtext) may already have loaded ",
+            r"% textcomp with different options.",
             _usepackage_if_not_loaded("textcomp"),
             r"\pagestyle{empty}",
             r"\begin{document}",
-            r"% The empty hbox ensures that a page is printed even for empty ",
+            r"% The empty hbox ensures that a page is printed even for empty",
             r"% inputs, except when using psfrag which gets confused by it.",
-            r"\fontsize{%f}{%f}%%" % (fontsize, baselineskip),
+            r"% matplotlibbaselinemarker is used by dviread to detect the",
+            r"% last line's baseline.",
+            rf"\fontsize{{{fontsize}}}{{{baselineskip}}}%",
             r"\ifdefined\psfrag\else\hbox{}\fi%",
-            r"{\obeylines%s %s}\special{matplotlibbaselinemarker}"
-            % (fontcmd, tex),
+            rf"{{\obeylines{fontcmd} {tex}}}%",
+            r"\special{matplotlibbaselinemarker}%",
             r"\end{document}",
         ])