update format

README.rst

@@ -238,7 +238,7 @@ header-only library so it doesn't provide any linkage options.
 
 
 Quick build
-~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~
 
 You can download and install fmt using the `vcpkg <https://github.com/Microsoft/vcpkg>`_ dependency manager::
 
@@ -248,7 +248,10 @@ You can download and install fmt using the `vcpkg <https://github.com/Microsoft/
     $ ./vcpkg integrate install
     $ ./vcpkg install fmt
 
-The fmt port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please `create an issue or pull request <https://github.com/Microsoft/vcpkg>`_ on the vcpkg repository.
+The fmt port in vcpkg is kept up to date by Microsoft team members and
+community contributors.
+If the version is out of date, please `create an issue or pull request <https://github.com/Microsoft/vcpkg>`_
+on the vcpkg repository.
 
 Running the tests
 ~~~~~~~~~~~~~~~~~