Fix markdown in README.md

[CI SKIP]

README.md

@@ -3,21 +3,21 @@ Boost Math Library
 
 This library is divided into several interconnected parts:
 
-===Floating Point Utilities===
+###Floating Point Utilities###
 
 Utility functions for dealing with floating point arithmetic, includes functions for floating point classification (fpclassify, isnan, isinf etc), sign manipulation, rounding, comparison, and computing the distance between floating point numbers.
 
-===Specific Width Floating Point Types===
+###Specific Width Floating Point Types###
 
 A set of typedefs similar to those provided by <cstdint> but for floating point types.
 
-===Mathematical Constants===
+###Mathematical Constants###
 
 A wide range of constants ranging from various multiples of pi, fractions, through to euler's constant etc.
 
 These are of course usable from template code, or as non-templates with a simplified interface if that is more appropriate.
 
-===Statistical Distributions===
+###Statistical Distributions###
 
 Provides a reasonably comprehensive set of statistical distributions, upon which higher level statistical tests can be built.
 
@@ -25,7 +25,7 @@ The initial focus is on the central univariate distributions. Both continuous (l
 
 A comprehensive tutorial is provided, along with a series of worked examples illustrating how the library is used to conduct statistical tests.
 
-===Mathematical Special Functions===
+###Mathematical Special Functions###
 
 Provides a small number of high quality special functions, initially these were concentrated on functions used in statistical applications along with those in the Technical Report on C++ Library Extensions.
 
@@ -35,27 +35,27 @@ All the implementations are fully generic and support the use of arbitrary "real
 
 These functions also provide the basis of support for the TR1 special functions.
 
-===Root Finding and Function Minimisation===
+###Root Finding and Function Minimisation###
 
 A comprehensive set of root finding algorithms over the real-line, both with and without derivative support.
 
 Also function minimisation via Brent's Method.
 
-===Polynomials and Rational Functions===
+###Polynomials and Rational Functions###
 
 Tools for manipulating polynomials and for efficient evaluation of rationals or polynomials.
 
-===Interpolation===
+###Interpolation###
 
 Function interpolation via Barycentic or cubic B_spline approximations.
 
-===Numerical Integration and Differentiation===
+###Numerical Integration and Differentiation###
 
 A reasonably comprehensive set of routines for integration (trapezoidal, Gaus-Legendre, Gaus-Kronrod and double-exponential) and differentiation.
 
 The integration routines are all usable for functions returning complex results - and as a result for contour integrals as well.
 
-===Quaternions and Octonions===
+###Quaternions and Octonions###
 
 Quaternion and Octonians as class templates similar to std::complex.