[PATCH v2 05/14] docs: conf.py: use dedent and r-strings for LaTeX macros

[Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>]

Instead of adding extra weird indentation at the tex
file, use dedent(). While here, also use r-strings, to make
easier to make its content identical to the .tex output.

While here, also merge "preamble" that was added on two
separate parts of the code (in the past, there were some
version-specific checks).

No functional changes, just cosmetic ones.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
---
 Documentation/conf.py | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/Documentation/conf.py b/Documentation/conf.py
index 6e12c7d8e07e..628af81e6879 100644
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -9,6 +9,8 @@ import os
 import shutil
 import sys
 
+from  textwrap import dedent
+
 import sphinx
 
 # If extensions (or modules to document with autodoc) are in another directory,
@@ -462,11 +464,11 @@ latex_elements = {
     "inputenc": "",
     "utf8extra": "",
     # Set document margins
-    "sphinxsetup": """
+    "sphinxsetup": dedent(r"""
         hmargin=0.5in, vmargin=1in,
         parsedliteralwraps=true,
         verbatimhintsturnover=false,
-    """,
+    """),
     #
     # Some of our authors are fond of deep nesting; tell latex to
     # cope.
@@ -475,20 +477,16 @@ latex_elements = {
     # For CJK One-half spacing, need to be in front of hyperref
     "extrapackages": r"\usepackage{setspace}",
     # Additional stuff for the LaTeX preamble.
-    "preamble": """
+    "preamble": dedent(r"""
         % Use some font with UTF-8 support with XeLaTeX
-        \\usepackage{fontspec}
-        \\setsansfont{DejaVu Sans}
-        \\setromanfont{DejaVu Serif}
-        \\setmonofont{DejaVu Sans Mono}
-    """,
-}
-
-# Load kerneldoc specific LaTeX settings
-latex_elements["preamble"] += """
+        \usepackage{fontspec}
+        \setsansfont{DejaVu Sans}
+        \setromanfont{DejaVu Serif}
+        \setmonofont{DejaVu Sans Mono}
         % Load kerneldoc specific LaTeX settings
-        \\input{kerneldoc-preamble.sty}
-"""
+        \input{kerneldoc-preamble.sty}
+    """)
+}
 
 # This will be filled up by config-inited event
 latex_documents = []
-- 
2.50.1