Fix encoding of TeX source file

sympy-tex-encoding.patch

@@ -0,0 +1,20 @@
+--- sympy-sympy-1.2/doc/cheatsheet/combinatoric_cheatsheet.tex.orig	2018-07-09 18:27:56.000000000 +0200
++++ sympy-sympy-1.2/doc/cheatsheet/combinatoric_cheatsheet.tex	2018-08-14 13:38:21.397200957 +0200
+@@ -425,7 +425,7 @@
+ 
+ 
+ \verb!coset_factor(g, af=False)!\\
+-Return GÔs (selfÕs) coset factorization, \verb!f,! of \verb!g!.
++Return G's (self's) coset factorization, \verb!f,! of \verb!g!.
+ 
+ 
+ 
+@@ -458,7 +458,7 @@
+ 
+ 
+ \verb!generate_dimino(af=False)!\\
+-Yield group elements using DiminoÕs algorithm
++Yield group elements using Dimino's algorithm
+ 
+ 
+ \verb!generate_schreier_sims(af=False)!\\

sympy.spec

@@ -14,6 +14,8 @@ Patch2:         %{name}-doc.patch
 # Fix _subexpr method in lambdify
 # https://github.com/sympy/sympy/pull/14945
 Patch3:         %{name}-subexpr-lambdify.patch
+# The TeX source has some weird symbols, we need to patch them out
+Patch4:         %{name}-tex-encoding.patch
 
 BuildArch:      noarch
 
@@ -115,6 +117,7 @@ HTML documentation for sympy.
 %patch1
 %patch2
 %patch3
+%patch4
 
 # If running on a 32-bit system, disable a test that requires 64-bit integers.
 %global maxpyint %(python3 -c 'import sys;print("%x" % sys.maxsize)')